WO2016150840A1 - Kantenemittierender halbleiterlaser und verfahren zu seiner herstellung - Google Patents
Kantenemittierender halbleiterlaser und verfahren zu seiner herstellung Download PDFInfo
- Publication number
- WO2016150840A1 WO2016150840A1 PCT/EP2016/055937 EP2016055937W WO2016150840A1 WO 2016150840 A1 WO2016150840 A1 WO 2016150840A1 EP 2016055937 W EP2016055937 W EP 2016055937W WO 2016150840 A1 WO2016150840 A1 WO 2016150840A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- layer
- semiconductor laser
- section
- emitting semiconductor
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/168—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising current blocking layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S2304/00—Special growth methods for semiconductor lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0206—Substrates, e.g. growth, shape, material, removal or bonding
- H01S5/0207—Substrates having a special shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/164—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising semiconductor material with a wider bandgap than the active layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3211—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures characterised by special cladding layers, e.g. details on band-discontinuities
Definitions
- the present invention relates to an edge emitting semiconductor laser according to claim 1 and to a method for producing an edge emitting semiconductor laser according to claim 8.
- An edge emitting semiconductor laser comprises a semiconductor structure having a layer sequence with layers superimposed along a growth direction.
- the semiconductor structure is bounded laterally by a first facet and a second facet.
- the semiconductor structure has a center portion and one to the first facet adjacent first edge section.
- the layer sequence is offset in the first edge section with respect to the middle section in the growth direction. Because the layer sequence of the semiconductor structure of this edge emitting semiconductor laser is offset in the first edge section from the center section, light excited in the semiconductor structure is guided in the first edge section in other layers of the layer sequence than in the center section. These other layers have a higher band gap, whereby absorption of light in the first edge portion is difficult or completely prevented.
- the first facet and the first edge section adjoining the first facet form a nonabsorbing mirror.
- This non-absorbing mirror has only a small mirror loss, whereby it during operation of the kan ⁇ tenemittierenden semiconductor laser also only a slight warming of the first facet and the first facet comes to ⁇ adjacent first edge portion.
- the layer sequence is followed by a lower cladding layer, a lower waveguide layer, an active layer, an upper layer
- Waveguide layer and an upper cladding layer on each other In this case, one of the cladding layers or one of the waveguide layers is arranged in the first edge section in the growth direction at the level of the active layer in the middle section.
- the semiconductor structure has a second edge section adjoining the second fa ⁇ cette. The layer sequence in the second edge section is offset from the middle section in the direction of growth.
- the second facet and adjacent to the second Fa ⁇ cette second edge portion of the semiconductor structure form a non-absorbing mirror.
- a risk of thermal destruction is also reduced in the region of the second facet.
- the displacement of the sequence of layers in the two ⁇ th edge portion of the displacement of the sequence of layers in the first edge portion corresponds.
- the semiconductor structure of the edge-emitting semiconductor laser in a symmetrical Gestal ⁇ tung which is advantageously particularly simple and kos ⁇ -effectively manufactured.
- the layer sequence is located in the first edge portion in wax ⁇ tumsraum higher than in the center portion. It is thereby achieved that a layer arranged in the center section below the active layer adjoins the active layer in the center section in the first edge section.
- the semiconductor structure comprises a substrate.
- the layer sequence is arranged over an upper side of the substrate.
- the layer sequence comprises an additional layer arranged at least in sections between the upper side of the substrate and the lower cladding layer.
- This additional layer has a different height in the middle section in the growth direction than in the first edge section.
- the height variation of the additional layer consists advantageously in the arranged above the additional layer ⁇ other layer sequence, thereby forming a displacement between the first edge portion and the central portion results in the layer sequence.
- the additional layer is electrically insulating or has a doping with the opposite sign as the lower cladding layer. In this case, the additional layer is not arranged in Mittenab ⁇ section between the upper side of the substrate and the lower cladding layer.
- the insulating additional layer may be formed, for example, as an undoped epitaxial layer, as a CVD diamond layer or as a dielectric layer.
- this additional layer blocks a current path through the layer sequence in the first edge section of the semiconductor structure. As a result, no laser light is excited in the first edge section of the semiconductor structure. In this way, any absorption losses reduce to the first facet and adjacent to the first facet first edge ⁇ section of the semiconductor structure advantageously on.
- the semiconductor structure between the mid section and the first edge portion has a first transition ⁇ portion.
- the layer sequence continues continuously between the middle section, the first transition section and the first edge section.
- the semiconductor structure is thereby particularly easy to produce.
- the edge emitting semiconductor laser of the central portion of the first facet comprises a distance between 0.1 ym and 100 ym to, preferably an Ab ⁇ was between 1 .mu.m and 20 .mu.m.
- such a distance has been found to be particularly effective for forming a non-absorbing mirror, at the first facet and the first facet adjacent to the first edge portion ⁇ .
- a contact layer and an upper metallization are arranged above the layer sequence.
- the upper Me ⁇ metallization is disposed only on the center portion, not to the first edge portion.
- the semiconductor structure of the kantenemit ⁇ tierenden semiconductor laser is energized in the operation of the edge-emitting semiconductor laser only in the middle section, but not in the first edge portion. As a result, no laser light is excited in the first edge section of the semiconductor structure, as a result of which any absorption losses at the first facet and in the first edge section adjoining the first facet are further reduced.
- a method of manufacturing an edge emitting semiconductor laser comprising the steps of providing a sub ⁇ strats having an upper surface for applying a surface at the top of the substrate having in a central portion ei ⁇ ne different height than in a first edge portion, for depositing a layer sequence over the surface and for breaking the substrate and the layer sequence such that a first facet is formed, to which the first Randab ⁇ section adjacent.
- edge-emitting semiconductor laser comprises a semiconductor structure of which the layer sequence is placed in a region adjacent to the first facet of the first edge portion opposite to the center portion in wax ⁇ tumsraum.
- the first facet and the first edge section adjoining the first facet of the semiconductor structure of this edge-emitting semiconductor laser act as a non-absorbing mirror.
- This nonabsorbent mirror has the advantages that no or only slight absorption losses occur in the region of the non-absorbing mirror, as a result of which there is no or only slight heating of the first facet and the first edge section adjoining the first facet. This also leads to only slight aging effects in the area of the first facet, which reduces the risk of thermal destruction of the first facet of the semiconductor structure of the edge-emitting semiconductor laser obtainable by the method.
- the process for producing the edge-emitting semiconductor laser is advantageously made without diffusion or implantation processes, making it easy and kontrol ⁇ prominent feasible.
- the method advantageously also requires no machining processes at high temperature, which avoids damage to an active layer of the semiconductor structure of the edge-emitting semiconductor laser obtainable by the method, which is accompanied by high-temperature processes. Damage to electrical contacts of the edge-emitting semiconductor laser which accompanies high-temperature processes is also avoided, as a result of which an undesired increase in the operating voltage of the edge-emitting semiconductor laser obtainable by the method is also avoided. Also others by high temperature processes
- the application of the surface comprises the steps of placing egg ⁇ ner additional layer on top of the substrate and distant Ent ⁇ a portion of the additional layer.
- a height of the additional layer varying at the upper side of the substrate is transferred into the layer sequence deposited over the additional layer, whereby a displacement in the growth direction between the first edge section and the middle section results in the semiconductor structure of the edge-emitting semiconductor laser obtainable by the method.
- the removal of the additional layer takes place by means of an etching method.
- the etching process may be, for example, a dry etching process. Since the removal of the substrate or the additional layer takes place before the growth of the layer sequence, such an etching method advantageously causes little or no damage to the substrate. ner active layer of the layer sequence of the obtainable by the procedural ⁇ ren semiconductor laser.
- the deposition of the layer sequence comprises depositing a lower cladding layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper cladding layer.
- the height difference of the surface between the middle section and the first edge section is dimensioned such that one of the cladding layers or one of the waveguide layers is arranged in the middle section in the first edge section at the level of the active layer.
- FIG. 1 is a sectional side view of a Halbleiterstruk ⁇ structure of an edge-emitting semiconductor laser according to a first embodiment
- Figure 2 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to a second embodiment.
- Figure 3 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to a third embodiment.
- Figure 4 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to a fourth embodiment.
- Figure 5 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to a fifth embodiment.
- FIG. 6 is a sectional side view of a semiconductor structure of an edge-emitting semiconductor laser according to a sixth embodiment
- Figure 7 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to a seventh embodiment.
- Fig. 8 is a sectional side view of a semiconductor structural ⁇ structure of an edge emitting semiconductor laser according to an eighth embodiment.
- Fig. 1 is a schematic sectional side view of egg ⁇ ner semiconductor structure 20 of an edge-emitting semiconductor laser 10.
- the edge-emitting semiconductor laser 10 may also be called a diode laser.
- the edge-emitting semiconductor laser 10 can be provided, for example, for the emission of light having a wavelength from the UV spectral range, from the visible spectral range or from the infrared spectral range.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 10 can be based, for example, on an AlInGaN, an AlGaAs or an InGaAlP material system.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 10 has a substrate 100 and an epitaxially grown over an upper side 101 of the substrate 100 Schich ⁇ tenate 200.
- the layer sequence in this case comprises a multi ⁇ number of layers along a growth direction 201 lie one above the other.
- the growth direction 201 is oriented perpendicular to the upper side 101 of the substrate 100.
- the semiconductor structure 20 is bounded laterally by a first facet 400, and through one of the first facet 400 regardlie ⁇ constricting second facet 500th
- the first facet 400 and the second facet 500 are oriented substantially parallel to the wax ⁇ tumscardi two hundred and first
- the first facet 400 and the second facet 500 have been formed after the epitaxial growth of the layer sequence 200 by breaking the semiconductor structure 20.
- the first facet 400 forms a rindemit ⁇ animal forming laser facet of the edge emitting Halbleiterla ⁇ sers 10.
- the edge-emitting semiconductor laser 10 is applied to the first facet 400 Laser light emitted in the direction perpendicular to the first facet 400 direction.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 10 has a center section 300 and a first edge section 410 adjoining the first facet 400.
- the central portion 300 and the first edge portion 410 in the upper side 101 of the substrate 100 disposed parallel direction ne ⁇ by side and limitations in the semiconductor structure 20 of the edge-emitting semiconductor laser 10 directly on Anei ⁇ Nander.
- the first edge portion 410 has, starting from the first
- the width 440 may ⁇ example, between 0.1 ym and ym be 100, particularly in ⁇ play between 1 .mu.m and 20 .mu.m.
- the layer sequence 200 of the semiconductor structure 20 of the edge-emitting semiconductor laser 10 is offset in the first edge section 410 from the center section 300 in the growth direction 201. In this case, the layers of the layer sequence 200 are in the middle section 300 of the semiconductor structure 20 in
- Growth direction 201 is higher than in the first edge portion 410.
- a substantially step-shaped first offset 430 in the layer sequence 200 is formed between the middle section 300 and the first edge section 410.
- a step 120 is formed at the top 101 of the substrate 100 of the semiconductor structure 20, a step 120 is formed.
- the upper side 101 of the substrate 100 is lower in the first edge section 410 in the growth direction 201 than in the middle section 300, as a result of which the step 120 results at the boundary between the edge section 410 and the center section 300.
- the difference in wax ⁇ tumsraum 201 level of the top 101 of the substrate 100 in the center portion 300 and the first edge distance section 410 has been transmitted during the epitaxial growth of the layer sequence 200 on the top 101 of the substrate 100 in the sequence of layers 200, whereby the first offset 430 was created.
- the step 120 on the upper side 101 of the substrate 100 may have been formed, for example, by removing part of the substrate 100 in the first edge section 410 before epitaxially growing the layer sequence 200.
- the removal of the part of the substrate 100 may, for example, be effected by an etching process, in particular by a dry etching process, for example.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 10 the Schich- comprises ten dispute 200, a lower cladding layer 210, a lower Wel ⁇ lenleiter für 220, an active layer 230, an upper waveguide layer 240 and an upper cladding layer 250, which in the in the order of growth 201. follow one another.
- the lower cladding layer 210 is closest to the substrate 100 and, in particular, may be arranged directly on the upper side 101 of the substrate 100.
- the layer sequence 200 could also have more
- 250 additional layers could be arranged between the substrate 100 and the lower cladding layer 210 and above the upper cladding layer.
- the lower cladding layer 210 and the lower waveguide layer 220 of the layer sequence 200 have a doping with a first sign, for example an n-doping.
- the upper waveguide layer 240 and the upper cladding layer 250 of the layer sequence 200 have a doping with signs reversed in comparison to the doping of the lower cladding layer 210 and the lower waveguide layer 220, for example a p-type doping.
- the lower cladding layer 210 and the upper cladding layer 250 of the layer sequence 200 comprise a first material.
- the lower waveguide layer 220 and the upper waveguide ⁇ layer 240 have a second material.
- the material of the lower cladding layer 210 and the upper cladding layer 250 has a smaller refractive index than the material of the lower waveguide layer 220 and upper waveguide layer 240.
- the lower cladding layer 210 and the upper Man ⁇ tel harsh 250 have a relation to the waveguide layers 220, 240 increased band gap on.
- the active layer 230 of the layer sequence 200 may, for example, be in the form of a quantum well or quantum well or a two-dimensional arrangement of quantum dots.
- the first offset 430 in the layer sequence 200 between the first edge portion 410 and the middle section 300 is dimensioned so that the upper is arranged Man ⁇ tel harsh 250 in the growth direction 201 at the level of the active layer 230 in the central portion 300 in the first edge portion 410th alternative It is possible to form the first offset 430 in such a way that in the first edge section 410 the upper waveguide layer 240 is arranged in the growth direction 201 at the level of the active layer 230 in the center section 300.
- the center portion 300 of the semiconductor structure 20 of the edge-emitting semiconductor laser 10 in the active layer 230 light generated out 240 between the cladding layers 210, 250 is in the central portion 300 in the waves ⁇ conductor layers 220.
- the light is Dage ⁇ gen at least partially ge ⁇ into the upper cladding layer 250th
- This has a relation to the waveguide layers 220, 240 increased band gap, whereby the guided in the first edge portion 410 in the upper cladding layer 250 light in the first edge portion 410 can not or only to a small extent can be absorbed.
- the first facet 400 and / or the second facet 500 of the semiconductor structure 20 of the edge-emitting semiconductor laser 10 can have coatings, not shown in FIG. 1, which can serve for passivation and / or for antireflection or for increasing the reflectivity.
- These coatings can be applied, for example, by vapor deposition, by sputtering or by CVD coating and can be, for example, Al 2 O 3, S 1 O 2, S 13 N 4 , T 1 O 2 , R 2 O, T a20 5 , HfO 2 , Si or other materials and combinations of these measures - have materials.
- the layer sequence 200 may additionally comprise a non-illustrated in FIG. 1 ⁇ contact layer above the upper cladding layer 250. Also, on top of the
- Layer sequence 200 may be arranged in Fig. 1 Metalli ⁇ tion not shown, which serves to electrically contact the semiconductor structure 20 of the edge-emitting semiconductor laser.
- This metallization can be spread over the center section 300 and réellere ⁇ ck over the first edge portion 410, but may also be limited to the center section 300.
- FIGS . 2 to 8 further edge-emitting semiconductor lasers will be described below.
- the further edge-emitting semiconductor lasers each have great similarities with the edge-emitting semiconductor laser 10 of FIG. 1. In the following, therefore, only the deviations of the further edge-emitting semiconductor lasers from the edge-emitting semiconductor laser 10 of FIG. 1 will be explained in each case.
- Components of the other edge-emitting semiconductor lasers which correspond to components present in the edge-emitting semiconductor laser 10 of FIG. 1 are given the same reference numerals in FIGS. 2 to 8 as in FIG. 1.
- the semiconductor structure 20 has, in addition to the center section 300 and the first edge section 410 adjoining the first facet 400, a second edge section 510 adjoining the second facet 500.
- a second offset 530 in the growth direction 201 is formed in the layer sequence 200 between the second edge section 510 and the center section 300.
- the second displacement 530 of the layer sequence 200 of the semi- conductor structure 20 of the edge-emitting semiconductor laser 11 between the second edge portion 510 and the Mittenab ⁇ cut 300 is formed so that the layers 210, 220, 230, 240, 250 of the layer sequence 200 in the second peripheral portion 510 lie in the growth direction 201 deeper than in the central portion 300.
- the second edge portion 510 is the upper one ⁇ tel für 250 disposed in the growth direction 201 at the level of the active layer 230 in the central portion 300th
- the center section 300 of the semiconductor structure 20 is excited and guided in the waveguide layers 220, 240 light in the second edge portion 510 at least partially guided in the upper cladding layer 250 and can not be absorbed in the second Randab ⁇ section 510 or only to a small extent.
- the second facet 500 and adjacent to the second facet 500 second Randab ⁇ section 510 has a non-absorbing mirror.
- the second offset 530 has been produced by a step 120 formed between the second edge section 510 and the center section 300 on the top side 101 of the substrate 100.
- the substrate 100 thus has 410 and the center portion 300 as well as on the border between the second edge portion 510 and middle portion 300 in each case a step 120 on both the boundary between the first edge portion.
- the adjacent to the second facet 500 second Randab ⁇ section 510 and the second offset 530 may mirror image ⁇ Lich to the region adjacent to the first facet 400 first edge portion 410 and the first dislocation be formed 430th
- the width of the second edge ⁇ portion 510 ie the distance of the center portion 300 of the second facet 500, the width 440 of the first Randab ⁇ section 410.
- the size of the second displacement 530 of the layer sequence 200 corresponds in wax ⁇ tumscardi 201 in second edge portion 510 of the size of the first offset 430, the layer sequence 200 410. in the first edge portion of Fig.
- FIG 3 shows a schematic sectional side view of the semiconductor structure 20 of an edge-emitting semiconductor laser 12 according to a third embodiment.
- the edge-emitting semiconductor laser 12 differs from the kan- 1, characterized in that the first offset 430 of the layer sequence 200 is formed in the first edge section 410 such that the layer sequence 200 in the first edge section 410 is higher in the growth direction 201 than in the center section 300. This results in the first edge section 410 the lower cladding layer 210 of the layers ⁇ sequence 200 in the growth direction 201 at the height of the active
- the lower waveguide layer 220 are in ers ⁇ th edge portion 410 in the growth direction 201 at the level of the active layer 230 in the central portion 300th
- the edge-emitting semiconductor laser 12 In the edge-emitting semiconductor laser 12, light excited in the middle section 300 of the semiconductor structure 20 in the active layer 230 and guided in the waveguide layers 220, 240 is guided at least partially in the lower cladding layer 210 in the first edge section 410.
- This has a relation to the waveguide layers 220, 240 increased band gap, whereby it can not or only slightly come to an absorption of light in the first edge portion 410.
- the first facet 400 and the first edge portion 410 adjoining the first facet 400 also form a nonabsorbing mirror in the case of the semiconductor structure 20 of the edge emitting semiconductor laser 12.
- the substrate 100 on its Obersei ⁇ te 101 a step 120 between the middle section 300 and the first edge portion 410, which continues in the grown over the upper surface 101 of the substrate 100 layer sequence 200 and the first displacement caused 430.
- the stage 120 at the top 101 of the substrate 100 is formed in the semiconductor structure 20 of the edge-emitting semiconductor laser 12 so that the upper surface 101 of the substrate 100 is higher in growth Rich ⁇ processing 201 in the first edge portion 410 than in the central portion 300.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 12, analogous to the semiconductor structure 20 of the edge-emitting semiconductor laser 11 of FIG. 2, can also be formed in the second edge section 510 adjoining the second facet 500 with a second offset 530, whereby the second facet 500 and the second facet 500 are also formed second edge portion 510 adjacent to the second facet 500 form a nonabsorbing mirror.
- the second edge portion 510 and the second transfer 530 may be formed 430, for example, a mirror image of the first ⁇ edge portion 410 and the first offset.
- FIG. 4 shows a schematic sectional side view of the semiconductor structure 20 of an edge-emitting semiconductor laser 13 according to a fourth embodiment.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 13 is formed as the semiconductor structure 20 of the kantenemit ⁇ animal type semiconductor laser 12 of FIG. 3.
- an upper metallization 110 which serves for the electrical contacting of the edge-emitting semiconductor laser 13, is arranged above the upper cladding layer 250 of the layer sequence 200. Between the upper cladding layer 250 and the upper Metalli ⁇ tion 110 also could still a in Fig. 4 are not ones shown, contact layer be disposed.
- the upper Metallisie ⁇ tion 110 extends over the central portion 300, but not over the first edge portion 410 of the semiconductor structure 20. Thus, during operation of the edge emitting semiconductor laser 13 no or only a small amount of electrical current in the first edge portion 410 through the layer sequence 200 of the semiconductor structure 20 headed.
- the top metallization 110 may not extend beyond the second edge portion 510.
- FIG. 5 shows a schematic sectional side view of the semiconductor structure 20 of an edge emitting semiconductor laser 14 according to a fifth embodiment.
- the substrate 100 has at its
- Top 101 no step on, but is flat. Instead, comprises the layer sequence 200 at the mid ⁇ conductor pattern 20 of the edge-emitting semiconductor laser 14, an additional layer 260 which is partially between the top surface 101 of the substrate 100 and the lower cladding layer 210 is disposed.
- This additional layer 260 is Darge ⁇ presented example only in the central portion 300 in place, but not in the first edge portion 410, whereby the additional layer 260 at the boundary between the center portion 300 and the first edge portion 410 forming a step 270th
- the step 270 continues in the epitaxially on the additional layer 260 and above the top surface 101 of the substrate 100 grown on ⁇ layer sequence 200, thereby forming the first offset 430th
- the additional layer 260 may be prior to the epitaxial growth of the further layers 210, 220, 230, 240, 250 first sur fa ⁇ chig, ie both in the center portion 300 as in the first Edge portion 410, be applied to the top 101 of the substrate 100, for example, also by epi ⁇ tactical growth. Subsequently, the additional layer 260 may have been removed in the first edge section 410, for example by an etching process, in particular, for example, by a dry etching process or a wet-chemical etching process. Subsequently, the remaining layers 210, 220, 230, 240, 250 of the layer sequence 200 were grown.
- the additional layer 260 after the planar On ⁇ not bring on the top 101 of the substrate 100 in the first edge portion 410 completely, but only partially ⁇ as to remove, so that the additional layer 260 then has in the central portion 300 in the growth direction 201 a greater height as in the first edge portion 410.
- the additional layer 260 is also completely or partially removed in the second edge section 510 before the remaining layers 210, 220, 230, 240, 250 of the layer sequence 200 are grown.
- the additional layer 260 has a doping with the same numerals as before ⁇ the doping of the lower cladding layer 210, for example, an n-type doping.
- the additional layer 260 may comprise the same material as the lower cladding layer 210.
- FIG. 6 shows a schematic sectional side view of the semiconductor structure 20 of an edge-emitting semiconductor laser 15 according to a sixth embodiment.
- the upper side 101 of the substrate 100 is planar and without a step 120.
- the additional layer is also at the mid ⁇ conductor pattern 20 of the edge-emitting semiconductor laser 15 between the top surface 101 of the substrate 100 and the lower cladding layer 210 in sections 260 upstream which forms the step 270, which continues in the remaining layer sequence 200 of the semiconductor structure 20 as the first offset 430.
- the additional layer 260 in the semiconductor structural ⁇ structure 20 of the edge-emitting semiconductor laser 15 only in the first edge portion 410 is present, but not in the central portion 300.
- the first transfer 430 in the semiconductor structure 20 of the edge-emitting semiconductor laser 15 is formed so that the layer sequence 200 is higher in the growth direction 201 in ers ⁇ th edge portion 410 than in the central portion 300. If the semiconductor structure 20 of the edge-emitting semiconductor laser 15 with a second displacement 530 of the layer sequence 200 in the region adjacent to the second facet 500 second edge portion 510 is.
- the additional layer 260 also in the second edge ⁇ section 510 available is possible.
- the additional layer 260 can be first sorted ⁇ on the upper side 101 of the substrate 100 at area 300 in the center portion and the first edge portion 410th Subsequently, the additional layer 260 in the center section 300 is completely or partially removed.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 15 260 has the additional layer to a Dotie ⁇ tion with the same sign as the doping of the lower cladding layer 210, for example, an n-type doping.
- the additional layer 260 may, for example, the same material have ⁇ as the lower cladding layer 210th
- FIG. 7 shows a schematic sectional side view of the semiconductor structure 20 of an edge-emitting semiconductor laser 16 according to a seventh embodiment.
- the semiconductor structure 20 of the edge-emitting semiconductor laser 16 is formed as the semiconductor structure 20 of the kantenemit ⁇ animal type semiconductor laser 15.
- the additional Layer 260 in the semiconductor structure 20 of the edge-emitting semiconductor laser ⁇ 16 either doping with respect to the doping of the lower cladding layer 210 opposite sign, so for example, a p-type doping, or has an insulating material. If the additional layer 260 comprises an insulating material, the additional layer 260 can ⁇ example, as a non-doped epitaxial layer, as CVD diamond layer or a dielectric layer being formed ⁇ be.
- the layer sequence 200 is designed to be defective and low in tension.
- an increase in leakage currents at the facets 400, 500 and an increase in the absorption at the facets 400, 500 can be largely avoided, which can result in high facet load limits.
- Low-tension layer sequence 200 minimizes unwanted
- Additional layer 260 to the crystal structure of the remaining layer sequence 200 can improve the fracture quality at the facets 400, 500, which in turn
- the additional layer 260 can be arranged ⁇ on the upper side 101 of the substrate 100 at first flat in the center portion 300 and the first edge portion 410th Subsequently, the additional layer 260 is completely removed in the middle section 300.
- the additional layer 260 which is doped Compared to the doping of the lower cladding layer 210 opposite sign, or an insulating material, it is ⁇ sufficient that during operation of the edge-emitting Halbleiterla ⁇ sers 16 no or only a small current flow through the Layer sequence 200 in the first edge portion 410 takes place.
- the layer sequence 200 has a first offset 430 in the first edge section 410 adjoining the first facet 400 and a second offset 530 in the second edge section 510 adjoining the second facet 500.
- the Verset ⁇ tongues 430, 530 are formed so that the Schich ⁇ tenate 200 in the middle portion 300 in the growth direction 201 is lower than in the first edge portion 410 and the second edge portion 510. It would be possible, however, in the semiconductor structure 20 of the edge emitting semiconductor laser 17 provide only the first offset 430 in the first edge portion 410 and to dispense with the second offset 530 in the second edge portion 510.
- a first transition section 420 is formed between the first edge section 410 and the center section 300. Accordingly, the second edge is between ⁇ portion 510 and the center portion 300, a second transition portion formed over ⁇ 520th.
- the individual layers 210, 220, 230, 240, 250 of the layer sequence 200 of the half ⁇ conductor pattern 20 of the edge-emitting semiconductor laser 17 continue from the center portion 300 via the first transition portion 420 to the first edge portion 410 and from the central portion 300 through the second transitional section 520 to the second edge portion 510 each continuously.
- the individual layers 210, 220, 230, 240, 250 of the layer sequence 200 are not perpendicular to the growth direction 201, but under a NEM deviating from 90 ° angle to the growth direction 201 arranged.
- the substrate 100 has no step 120 in the semiconductor structure 20 of the edge-emitting semiconductor laser 17.
- the layer sequence 200 of the half ⁇ conductor pattern 20 of the edge-emitting semiconductor laser 17 includes an additional layer 260 which is on ⁇ arranged in the edge portions 410, 510 and the transition portions 420, 520 between the top side 101 of the substrate and the lower cladding layer 210th
- the additional layer 260 is completely removed in the semi-conductor structure ⁇ 20 of the edge-emitting semiconductor laser 17th
- the additional ⁇ layer is formed 260 with a doping whose first sign which the doping of the lower cladding layer 210 corresponds to, so could be a part of the additional layer 260 in the middle portion 300 between the upper surface 101 of the substrate 100 and the lower cladding layer may be arranged 210 ,
- the parts of the additional layer 260 arranged in the edge sections 410, 510 in the growth direction 201 would have a greater thickness than the part of the additional layer 260 arranged
- the additional layer 260 forms in the transition sections 420, 520 ramps 280, whose tops are not arranged parallel to the upper side 101 of the substrate 100.
- the upper sides of the ramps 280 have an angle to the upper side 101 of the substrate 100, which may be between 3 ° and 90 °, in particular between 10 ° and 88 °, in particular between 20 ° and 80 °.
- the additional layer 260 does not have a step therewith.
- the additional layer 260 forms in the semiconductor structure 20 of the kantenemittie ⁇ Governing semiconductor laser 17, the ramp 280, the thickness of the additional layer kon ⁇ continuously changes in the growth direction 201 along the 260th
- the top side 101 of the substrate 100 is recessed in the middle section 300, so that the top side 101 of the substrate 100 is located lower in the center section 300 in the growth direction 201 than in the edge sections 410, 510.
- the top side 101 of the substrate 100 becomes such ist obliquely ⁇ that the metered in the growth direction 201 HOE height of the upper surface 101 of the substrate 100 between the Mittenab ⁇ section 300 and the edge portions 410, 510 continuously changes.
- the top side 101 of the substrate 100 forms the ramp 280 in the transitional sections 420, 520.
- the additional layer 260 is formed to have a greater thickness in the center section 300 in the growth direction 201 than in the edge sections 410, 510.
- the thickness of the additional layer 260 changes continuously.
- the layers 210, 220, 230, 240, 250 in the middle section 300 are then higher in the growth direction 201 than in the edge sections 410, 510.
- the additional layer 260 is dispensed with.
- the upper side 101 of the substrate 100 is structured in such a way that the upper side 101 of the substrate 100 is higher in the middle section 300 in the growth direction 201 than in the edge sections 410, 510.
- the height of the upper side 101 of FIG Substrate 100 in turn continuously.
- the layers 210, 220, 230, 240, 250 of the layer sequence 200 grown over the upper side 101 of the substrate 100 are also higher in the middle section 300 in the growth direction 201 than in the edge sections 410, 510 in this case.
- the ratios vice versa In still another From ⁇ guide die, the ratios vice versa.
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/559,725 US20180048114A1 (en) | 2015-03-20 | 2016-03-18 | Edge-emitting semiconductor laser and method for the production thereof |
CN201680016839.1A CN107431333A (zh) | 2015-03-20 | 2016-03-18 | 边缘发射半导体激光器及其生产方法 |
DE112016001300.0T DE112016001300A5 (de) | 2015-03-20 | 2016-03-18 | Kantenemittierender halbleiterlaser und verfahren zu seiner herstellung |
JP2017545726A JP2018511171A (ja) | 2015-03-20 | 2016-03-18 | 端面発光型半導体レーザおよびその製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015104184.7 | 2015-03-20 | ||
DE102015104184.7A DE102015104184A1 (de) | 2015-03-20 | 2015-03-20 | Kantenemittierender Halbleiterlaser und Verfahren zu seiner Herstellung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016150840A1 true WO2016150840A1 (de) | 2016-09-29 |
Family
ID=55588255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/055937 WO2016150840A1 (de) | 2015-03-20 | 2016-03-18 | Kantenemittierender halbleiterlaser und verfahren zu seiner herstellung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20180048114A1 (de) |
JP (1) | JP2018511171A (de) |
CN (1) | CN107431333A (de) |
DE (2) | DE102015104184A1 (de) |
WO (1) | WO2016150840A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000196188A (ja) * | 1998-12-25 | 2000-07-14 | Toshiba Corp | 半導体レ―ザ素子およびその製造方法 |
US20040115847A1 (en) * | 2001-10-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating semiconductor light emitting device |
JP2008181928A (ja) * | 2007-01-23 | 2008-08-07 | Sony Corp | 半導体レーザおよびその製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3604294A1 (de) * | 1986-02-12 | 1987-08-13 | Telefunken Electronic Gmbh | Heterostruktur-halbleiterlaserdioden |
JPS6384087A (ja) * | 1986-09-26 | 1988-04-14 | Nec Corp | 半導体レ−ザ素子 |
JPS63236385A (ja) * | 1987-03-25 | 1988-10-03 | Hitachi Ltd | 半導体発光素子 |
JPH0537077A (ja) * | 1991-07-25 | 1993-02-12 | Mitsubishi Electric Corp | 可視光半導体レーザおよびその製造方法 |
DE69113471T2 (de) * | 1991-12-05 | 1996-05-02 | Ibm | Auf einer strukturierten Substratoberfläche aufgewachsene Halbleiter-Laserdiode. |
JP2005294394A (ja) * | 2004-03-31 | 2005-10-20 | Toyoda Gosei Co Ltd | 半導体レーザ及びその製造方法 |
JP5079613B2 (ja) * | 2008-07-14 | 2012-11-21 | シャープ株式会社 | 窒化物系半導体レーザ素子およびその製造方法 |
JP2013058583A (ja) * | 2011-09-08 | 2013-03-28 | Sharp Corp | 半導体レーザ素子、及び半導体レーザ素子の製造方法 |
-
2015
- 2015-03-20 DE DE102015104184.7A patent/DE102015104184A1/de not_active Withdrawn
-
2016
- 2016-03-18 CN CN201680016839.1A patent/CN107431333A/zh active Pending
- 2016-03-18 WO PCT/EP2016/055937 patent/WO2016150840A1/de active Application Filing
- 2016-03-18 DE DE112016001300.0T patent/DE112016001300A5/de not_active Ceased
- 2016-03-18 US US15/559,725 patent/US20180048114A1/en not_active Abandoned
- 2016-03-18 JP JP2017545726A patent/JP2018511171A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000196188A (ja) * | 1998-12-25 | 2000-07-14 | Toshiba Corp | 半導体レ―ザ素子およびその製造方法 |
US20040115847A1 (en) * | 2001-10-29 | 2004-06-17 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating semiconductor light emitting device |
JP2008181928A (ja) * | 2007-01-23 | 2008-08-07 | Sony Corp | 半導体レーザおよびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
DE102015104184A1 (de) | 2016-09-22 |
DE112016001300A5 (de) | 2017-11-30 |
JP2018511171A (ja) | 2018-04-19 |
CN107431333A (zh) | 2017-12-01 |
US20180048114A1 (en) | 2018-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102017108949B4 (de) | Halbleiterchip | |
DE3306085A1 (de) | Halbleiterlaser | |
DE102017109809B4 (de) | Verfahren zur Herstellung eines Halbleiterchips | |
DE102007026925A1 (de) | Integrierte Trapezlaseranordnung und Verfahren zu deren Herstellung | |
DE3936694A1 (de) | Halbleiterbauteil mit gitterstruktur | |
DE102010046793B4 (de) | Kantenemittierende Halbleiterlaserdiode und Verfahren zu dessen Herstellung | |
DE19652529A1 (de) | Optoelektronisches Bauelement mit MQW-Strukturen | |
WO2007098730A2 (de) | Halbleiterlaservorrichtung | |
DE60206633T2 (de) | Herstellungsverfahren eines vcsel mit dielektrischem spiegel und selbsteinrichtender verstärkungsführung | |
DE60028727T2 (de) | Herstellungsverfahren für Bauelemente mit gradiertem Top-Oxid und Drift-Gebiet | |
EP1155482B1 (de) | Vertikalresonator-laserdiode mit einer lichtabsorbierenden schicht | |
EP0383958A1 (de) | Abstimmbarer Halbleiterlaser | |
EP3304662A1 (de) | Halbleiterlaserdiode und verfahren zur herstellung einer halbleiterlaserdiode | |
WO2017178219A1 (de) | Kantenemittierender halbleiterlaser | |
EP1906497B1 (de) | Halbleiterlaservorrichtung und Verfahren zu deren Herstellung | |
WO2016150840A1 (de) | Kantenemittierender halbleiterlaser und verfahren zu seiner herstellung | |
EP2514049B1 (de) | Verfahren zur Herstellung lichtemittierender Halbleiterkörper | |
DE3539355C2 (de) | ||
DE102011086744B3 (de) | Diodenlaser und Verfahren zur Herstellung eines Diodenlasers mit hoher Effizienz | |
DE102020200468A1 (de) | Halbleiterlaserdiode und verfahren zur herstellung einer halbleiterlaserdiode | |
DE10322112B4 (de) | Verfahren zur Auslegung einer modengekoppelten Halbleiterlaser-Pulsquelle und damit ausgelegte Halbleiterlaser-Pulsquelle | |
WO2020078744A1 (de) | Halbleiterlaser und herstellungsverfahren für halbleiterlaser | |
WO2020058082A1 (de) | Gewinngeführter halbleiterlaser und herstellungsverfahren hierfür | |
DE112016000832B4 (de) | Verfahren zur Strukturierung einer Nitridschicht, optoelektronisches Bauelement und Ätzverfahren zum Ätzen von Schichten | |
DE102018125493A1 (de) | Kantenemittierender halbleiterlaser und verfahren zur herstellung eines kantenemittierenden halbleiterlasers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16711233 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017545726 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15559725 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112016001300 Country of ref document: DE |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112016001300 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16711233 Country of ref document: EP Kind code of ref document: A1 |