CN1434311A - Polarizer based on guided wave resonance - Google Patents
Polarizer based on guided wave resonance Download PDFInfo
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- CN1434311A CN1434311A CN 03115556 CN03115556A CN1434311A CN 1434311 A CN1434311 A CN 1434311A CN 03115556 CN03115556 CN 03115556 CN 03115556 A CN03115556 A CN 03115556A CN 1434311 A CN1434311 A CN 1434311A
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Abstract
The invention is a polarizer based on wave-guide resonance. It consists of lengthened prism, underside metal film, medium film and transmission-increasing film, and uses the metal film and the medium film to form single-side metal-enveloping wave-guide construction and adopts the medium film as wave-guide layer and the metal film as envelope layer. It leads in the laser beam through the fibre-optical joint, makes the beam irradiate at the angle of wave-guide resonance, many times excites the resonance on the basal plane of lengthened prism in order plated with metal and medium films for getting rid of S or P wave and only leaving P or S wave, which realizes the high polarization.
Description
Technical field
Involved in the present invention is a kind of polarizer that produces polarized light, and particularly a kind of polarizer of the high polarization extinction ratio based on the guided wave resonance of lengthening in the prism belongs to photoelectron communication and optical information processing field.
Background technology
Recent two decades comes, and along with the particularly development of optical communication technique of laser technology, the research and the application of optical polarization device have obtained significant progress.Wherein, the most commonly utilize the birefringence effect in the crystal and polarizer that the bonding birefringent prism method that adopts is made, and such device uses widely in practice, also more to its report.By literature search, find that the patent No. is that 5,440,424 United States Patent (USP) has proposed a kind of polarizer that utilizes bonding birefringent prism to make.In this device, altogether bonding seven birefringent prisms are to realize its function.At first, because the effect of birefringence effect, first prism be to the refractive index difference of two kinds of polarized components of incident laser light beam, thereby make their directions of propagation in prism disconnected from each other.The effect of follow-up birefringent prism has nothing in common with each other.The second fast prism expands the fractional dose of two kinds of polarized components to a certain degree to; The 3rd prism makes these two polarized components produce differing of half wavelength, thereby makes the polarization direction of two components become the same; Ensuing four prisms make up in a particular manner, realize these two components are coupled to together again, and the laser beam that becomes a branch of single polarization penetrates prism, has realized the polarization of laser.
This device can rise partially laser beam, and reaches higher degree of polarization (usually, this device can reach the above polarization extinction ratio of 40dB).Close with this device, other also polarizer of more simple bonding prism more commonly used also has Lip river breast (Rochon) prism, Wollaston (Wollaston) prism, Nicol (Nicol) prism and other Glan class (Glan-type) prism etc.But because in the structure of this bonding prism, the processing of prism and optical axis orientation are very complicated, accuracy requirement is very high, for example, usually require the cut surface of prism will be parallel to the optical axis of crystal fully, and in the bonding prism, what the angle between its two relative faces need be processed is very accurate to guarantee that its difference is that a specific constant is to satisfy the optimization of birefringence effect, two prisms are also noted that when bonding that its relative optical axis wants complete quadrature or parallel, want optical axis parallel fully or vertical and crystal during light beam incident.And that these require to be difficult to usually in the machining of reality and optical application is satisfied fully, and the performance of device is decreased.In addition, the designing requirement light beam of some prism is from some incident of prism, and if with the contrary turnback (this is common occurrence in optical application) of light path, the performance of device has bigger difference in the time of will be with forward entrance.In addition, materials such as the bonding common use canada balsam of two prisms, and the absorption of these materials has also limited the range of application of this class device greatly.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of polarizer based on guided wave resonance is provided, lengthening prism by bottom surface metal-plated membrane successively and dielectric film excites guided wave to resonate to realize the polarization of laser, and resonate by the repeatedly guided wave that lengthening excites in the prism and to reach higher polarization extinction ratio, thereby make outgoing beam reach very high degree of polarization, can select the light beam of different polarization direction (P ripple or S ripple) as output simultaneously; Polarizer of the present invention has less insertion loss, and the performance of polarizer and optical direction are irrelevant, and promptly the performance in the forward and reverse logical light time is identical, and this polarizer has characteristic simple to operate, that be convenient to encapsulate.
The present invention is achieved by the following technical solutions, polarizer of the present invention is made of lengthening prism, bottom surface metal film, dielectric film and anti-reflection film (), (two), lengthening prism, bottom surface metal film, dielectric film from top to bottom are provided with, anti-reflection film (one), (two) are plated on two sides of lengthening prism, bottom surface metal film and dielectric film form single face metal-cladding waveguide structure, dielectric film is a ducting layer, and the bottom surface metal film is a clad.Import and export fibre-optical splice (), (two), (three) and (four) and laser beam is imported or derives polarizer, wherein, fibre-optical splice (one), (two) are with respect to lengthening prism symmetry, fibre-optical splice (three), (four) are with respect to lengthening prism symmetry, its incident angle is respectively α and β, and respectively perpendicular to two planes on the every flank side surface of lengthening prism, extend thus prism, bottom surface metal film and dielectric film forms the attenuated total reflection structure, from fibre-optical splice (once), the guided wave that laser beam excited of (three) incident propagates dielectric film.
The lengthening prism can adopt high index prism (1.4＜n＜3.0) device, the material of lengthening prism can be selected optical glass having high refractive index or crystalline material, the shape of lengthening prism can be determined according to actual needs, make the incident laser light beam that the repeatedly internal reflection of (more than twice or twice) take place on its bottom surface, its plane of incidence can be selected other common or special shapes such as plane, the face of cylinder, sphere, and incident angle should be operated near the guided wave resonance angle.
Be coated with anti-reflection film on the incident of lengthening prism and the exit facet, insert loss to reduce polarizer.The incident of lengthening prism and exit facet are if adopt the folding face, then should make two plane respectively perpendicular to the incident beam that can excite the resonance of S ripple (its direction of vibration is perpendicular to the plane of incidence) or P ripple (its direction of vibration is parallel to the plane of incidence) guided wave, promptly should make these two planes that the inclination angle of bottom surface is equaled S ripple or P waveguide ripple resonance angle respectively.
The bottom surface metal film generally can be selected for use operation wavelength (can see infrared light frequently) is absorbed less metal.Dielectric constant of metal ε=ε
r+ i ε
iRelevant with operation wavelength, and the thickness of bottom surface metal film makes the guided wave resonance absorption the strongest.Metal species can be selected the less metal of specific inductive capacity imaginary part in operating wavelength range such as silver, gold, aluminium, copper.Generally require its real part of permittivity ε
r≤-8.0, specific inductive capacity imaginary part ε
i≤ 15.0.The thickness of bottom surface metal film is plated on the bottom surface of lengthening prism between 15nm～60nm.
The material of dielectric film can adopt optical glass, oxide, crystalline material or polymkeric substance etc., require it that laser beam under operation wavelength is not had absorption, and its refractive index is between 1.4～3.2.The thickness of dielectric film is decided on actual conditions, generally greater than 0.4 μ m, is plated in below the metal film of bottom surface.The thickness of metallic film and dielectric film satisfies the optimum coupling condition under selected optical maser wavelength, make guided wave resonance the strongest.
Fibre-optical splice can adopt various standards or special fiber joint, makes its two planes on prism two flank side surface during placement, promptly can inject prism perpendicular to the plane of incidence from fibre-optical splice emitting laser light beam.
Among the present invention, the S ripple (or P ripple) in the decay incident laser light beam that the guided wave resonance that excites on the bottom surface of lengthening prism can be very strong then passes through fully to the light beam P ripple (or S ripple) of another kind of polarization; Because in the lengthening prism, can form repeatedly reflection, repeatedly excite the guided wave resonance of decay S ripple (or P ripple), thereby can reach very high polarization extinction ratio, and produce the outgoing beam of high degree of polarisation.Simultaneously, because the light beam P ripple (or S ripple) of another kind of polarization takes place in polarizer all is total reflection, thereby can make polarizer have less insertion loss.In addition, to the setting of two planes of incidence of lengthening prism, can both effectively reduce the insertion loss to anti-reflection film on the placement of the design at inclination angle, bottom surface, fibre-optical splice and incident, the exit facet.
The present invention has realized high degree of polarisation to laser beam with a kind of brand-new thinking, the technology that laser beam carries out polarization is compared by bonding prism with existing, possesses following advantage:
1, polarization extinction ratio height.Utilize apparatus of the present invention, by repeatedly exciting guided wave on the lengthening prism bottom surface to resonate to realize the high degree of polarisation to laser beam, its extinction ratio to the P ripple can reach more than the 30dB, also can reach more than the 30dB the extinction ratio of S ripple.
2, less insertion loss.Utilizing apparatus of the present invention, for not exciting the polarized component of guided wave resonance in the incident beam, all be total reflection owing to what take place on each reflecting surface in the lengthening prism, thereby light intensity loss is very little.Simultaneously, two flank side surface of lengthening prism make laser beam form vertical incidence on incident and exit facet to the design at inclination angle, bottom surface, and on these two faces, all designed anti-reflection film, thereby can effectively reduce the insertion loss of whole polarizer, can be equal to or less than 0.8dB usually.
3, can on two polarization directions, export the light beam of high degree of polarisation.Utilize apparatus of the present invention, can select the polarization direction of output beam as requested.If the light beam of output P polarization then adopts fibre-optical splice (), (two) respectively as incident and outgoing joint; If the light beam of output S polarization then adopts fibre-optical splice (three), (four) respectively as incident and outgoing joint.
4, polarizer performance and optical direction are irrelevant.Because principle of work of the present invention resonates based on guided wave, irrelevant to light from which direction (forward, oppositely) incident, so polarizer is identical in the performance of forward and reverse logical light time.Reduced the trouble of practical application.
5, simple to operate, be easy to integrated.Polarizer of the present invention only needs as required, selects corresponding fibre-optical splice as input, out splice going splice, then can obtain the outgoing beam of required high-polarization, and is therefore simple to operate, and it is convenient to use, and is easy to integrated.
The present invention has substantive distinguishing features and marked improvement, polarizer of the present invention, can be widely used in a plurality of fields such as photoelectron communication, optical sensor, optical interdferometer and optical information processing, especially links such as the processing of optic communication device, test, utilize the technology of the present invention, can guarantee its have high polarization extinction ratio, low insertion loss, two kinds of polarization direction outputs, polarization property and optical directions irrelevant, simple to operate, be easy to integrated contour technical feature.
Description of drawings
Fig. 1 polarizer structure synoptic diagram of the present invention
Embodiment
As shown in Figure 1, polarizer of the present invention is made of lengthening prism 1, bottom surface metal film 2, dielectric film 3 and anti-reflection film 4,5, lengthening prism 1, bottom surface metal film 2, dielectric film 3 from top to bottom are provided with, anti-reflection film 4,5 is plated on lengthening prism 1 two sides, bottom surface metal film 2 and dielectric film 3 form single face metal-cladding waveguide structure, dielectric film 3 is a ducting layer, and bottom surface metal film 2 is a clad.Import and export fibre- optical splice 6,7,8 and 9 and laser beam is imported or derives polarizer, wherein, fibre- optical splice 6,7 is with respect to lengthening prism 1 symmetry, fibre- optical splice 8,9 is with respect to lengthening prism 1 symmetry, its incident angle is respectively α and β, and respectively perpendicular to two planes on lengthening prism 1 every flank side surface, the prism 1 that extends thus, bottom surface metal film 2 and dielectric film 3 form the attenuated total reflection structure, just propagate dielectric film 3 from the guided wave that laser beam excited of fibre- optical splice 6,8 incidents.
Be coated with anti-reflection film 4 and 5 on the incident of lengthening prism 1 and the exit facet, the incident of lengthening prism 1 and exit facet are if adopt the folding face, then two plane respectively perpendicular to excite S ripple or P waveguide ripple resonance incident beam, promptly these two planes equal S ripple or P waveguide ripple resonance angle respectively to the inclination angle of bottom surface.
Bottom surface metal film 2 is selected for use operation wavelength is absorbed less metal, dielectric constant of metal ε=ε
r+ i ε
iRelevant with operation wavelength, the thickness of bottom surface metal film 2 makes the guided wave resonance absorption the strongest, and the thickness of bottom surface metal film 2 is plated on the bottom surface of lengthening prism 1 between 15nm～60nm.Metal species is selected the less metal of specific inductive capacity imaginary part in operating wavelength range such as silver, gold, aluminium, copper, its real part of permittivity ε
r≤-8.0, specific inductive capacity imaginary part ε
i≤ 15.0.
The material of dielectric film can adopt optical glass, oxide, crystalline material or polymkeric substance etc., require it that laser beam under operation wavelength is not had absorption, and its refractive index is between 1.4～3.2.The thickness of dielectric film is decided on actual conditions, generally greater than 0.4 μ m, is plated in below the bottom surface metal film 2.The thickness of metallic film and dielectric film satisfies the optimum coupling condition under selected optical maser wavelength, make guided wave resonance the strongest.
Below in conjunction with according to three embodiment based on the efficiency light ratio polarization device of guided wave resonance in the lengthening prism proposed by the invention, the present invention is further illustrated:
Polarizer of the present invention is made of lengthening prism 1, bottom surface metal film 2, dielectric film 3 and anti-reflection film 4,5, lengthening prism 1, bottom surface metal film 2, dielectric film 3 from top to bottom are provided with, anti-reflection film 4,5 is plated on lengthening prism 1 two sides, bottom surface metal film 2 and dielectric film 3 form single face metal-cladding waveguide structure, dielectric film 3 is a ducting layer, and bottom surface metal film 2 is a clad.Import and export fibre- optical splice 6,7,8 and 9 and laser beam is imported or derives polarizer, wherein, fibre- optical splice 6,7 is with respect to lengthening prism 1 symmetry, fibre- optical splice 8,9 is with respect to lengthening prism 1 symmetry, its inclination angle to lengthening prism bottom surface is respectively 47.4 and 35.8 degree, and respectively perpendicular to two planes on lengthening prism 1 every flank side surface, extend thus prism 1, bottom surface metal film 2 and dielectric film 3 forms the attenuated total reflection structures, from the just propagation dielectric film 3 of the guided wave that laser beam excited of fibre- optical splice 6,8 incidents.
Lengthening prism 1 material selection high index of refraction lengthening prism (ZF6, n=1.7355), two planes on its side are respectively 42.6 degree and 54.2 degree to the inclination angle of bottom surface, highly be about 1cm, upper bottom surface length is 2.3cm, bottom surface length is about 3.8cm, satisfies twice conditioned reflex, makes laser beam form two secondary reflections at its bottom surface; And on the lengthening outgoing of prism 1 and the plane of incidence evaporation last layer anti-reflection film 4 and 5, to reduce its reflection loss.
Select the output of P polarized light or S polarized light, respectively can be from fibre- optical splice 6 or 8 incidents, its operating angle is guided wave resonance angle 42.6 degree or 54.2 degree.Laser wavelength of incidence is 690.0nm.Be coated with bottom surface metal film 2 and dielectric film 3 successively on the bottom surface of lengthening prism 1, wherein, bottom surface metal film 2 materials employing silver (ε under the 690.0nm wavelength=-19.69+i1.24), utilize sputtering method to be plated on the bottom surface of lengthening prism 1, thickness is 44.5nm; Dielectric film 3 material selection polymkeric substance, its refractive index is 1.68, adopt the whirl coating method be plated in bottom surface metal film 2 below, thickness is 0.45 μ m.Reception promptly gets the P polarization of high-polarization or the laser beam of S polarization from the light beam of fibre- optical splice 7,9 outgoing.
Experiment and Theoretical Calculation show, if select for use from fibre-optical splice 6 incidents, receives from fibre-optical splice 7 and to export light, and polarizer of the present invention can reach more than the 33dB the extinction ratio of S ripple, and the insertion loss of P ripple is about 0.6dB; If select for use from fibre-optical splice 8 incidents, receive the output light from fibre-optical splice 9, polarizer of the present invention can reach more than the 39dB the extinction ratio of P ripple, and the insertion loss of S ripple is about 0.4dB.
Embodiment 2
Polarizer of the present invention is made of lengthening prism 1, bottom surface metal film 2, dielectric film 3 and anti-reflection film 4,5, lengthening prism 1, bottom surface metal film 2, dielectric film 3 from top to bottom are provided with, anti-reflection film 4,5 is plated on lengthening prism 1 two sides, bottom surface metal film 2 and dielectric film 3 form single face metal-cladding waveguide structure, dielectric film 3 is a ducting layer, and bottom surface metal film 2 is a clad.Import and export fibre- optical splice 6,7,8 and 9 and laser beam is imported or derives polarizer, wherein, fibre- optical splice 6,7 is with respect to lengthening prism 1 symmetry, fibre- optical splice 8,9 is with respect to lengthening prism 1 symmetry, its inclination angle to lengthening prism bottom surface is respectively 47.15 and 38.9 degree, and respectively perpendicular to two planes on lengthening prism 1 every flank side surface, extend thus prism 1, bottom surface metal film 2 and dielectric film 3 forms the attenuated total reflection structures, from the just propagation dielectric film 3 of the guided wave that laser beam excited of fibre- optical splice 6,8 incidents.
Lengthening prism 1 material selection high index of refraction lengthening prism (ordinary optical glass, n=1.5), two planes on its side are respectively 42.85 degree and 51.1 degree to the inclination angle of bottom surface, it highly is about 1.2cm, upper bottom surface length is 2.3cm, bottom surface length is about 4.5cm, satisfies twice conditioned reflex, makes laser beam form two secondary reflections at its bottom surface; And on the lengthening outgoing of prism 1 and the plane of incidence evaporation last layer anti-reflection film 4 and 5, to reduce its reflection loss.
Select the output of P polarized light or S polarized light, respectively can be from fibre- optical splice 6 or 8 incidents, its operating angle is guided wave resonance angle 42.85 degree or 51.1 degree.Laser wavelength of incidence is 560.0nm.Be coated with bottom surface metal film 2 and dielectric film 3 successively on the bottom surface of lengthening prism 1, wherein, bottom surface metal film 2 materials employing silver (ε under the 560.0nm wavelength=-11.89+i0.83), utilize sputtering method to be plated on the bottom surface of lengthening prism 1, thickness is 27.5nm.Dielectric film 3 material selection polymkeric substance, its refractive index is 1.68, adopt the whirl coating method be plated in bottom surface metal film 2 below, thickness is 0.9 μ m.Reception promptly gets the P polarization of high-polarization or the laser beam of S polarization from the light beam of fibre- optical splice 7,9 outgoing.
Experiment and Theoretical Calculation show, if select for use from fibre-optical splice 6 incidents, receives from fibre-optical splice 7 and to export light, and polarizer of the present invention can reach more than the 38dB the extinction ratio of S ripple, and the insertion loss of P ripple is about 0.7dB; If select for use from fibre-optical splice 8 incidents, receive the output light from fibre-optical splice 9, polarizer of the present invention can reach more than the 39dB the extinction ratio of P ripple, and the insertion loss of S ripple is about 0.4dB.
Polarizer of the present invention is made of lengthening prism 1, bottom surface metal film 2, dielectric film 3 and anti-reflection film 4,5, lengthening prism 1, bottom surface metal film 2, dielectric film 3 from top to bottom are provided with, anti-reflection film 4,5 is plated on lengthening prism 1 two sides, bottom surface metal film 2 and dielectric film 3 form single face metal-cladding waveguide structure, dielectric film 3 is a ducting layer, and bottom surface metal film 2 is a clad.Import and export fibre- optical splice 6,7,8 and 9 and laser beam is imported or derives polarizer, wherein, fibre- optical splice 6,7 is with respect to lengthening prism 1 symmetry, fibre- optical splice 8,9 is with respect to lengthening prism 1 symmetry, its inclination angle to lengthening prism bottom surface is respectively 53.0 and 42.65 degree, and respectively perpendicular to two planes on lengthening prism 1 every flank side surface, extend thus prism 1, bottom surface metal film 2 and dielectric film 3 forms the attenuated total reflection structures, from the just propagation dielectric film 3 of the guided wave that laser beam excited of fibre- optical splice 6,8 incidents.
Lengthening prism 1 material selection high index of refraction lengthening prism (ZF6, n=1.7355), two planes on its side are respectively 37.0 degree and 47.35 degree to the inclination angle of bottom surface, it highly is about 0.8cm, upper bottom surface length is 3.5cm, bottom surface length is about 5.4cm, satisfies the triple reflection condition, makes laser beam form triple reflection at its bottom surface; And on the lengthening outgoing of prism 1 and the plane of incidence evaporation last layer anti-reflection film 4 and 5, to reduce its reflection loss.
Select the output of P polarized light or S polarized light, respectively can be from fibre- optical splice 6 or 8 incidents, its operating angle is guided wave resonance angle 37.0 degree or 47.35 degree.Laser wavelength of incidence is 1550.0nm.Be coated with bottom surface metal film 2 and dielectric film 3 successively on the bottom surface of lengthening prism 1, wherein, bottom surface metal film 2 materials employing gold (ε under the 1550.0nm wavelength=-117.34+i10.95), utilize sputtering method to be plated on the bottom surface of lengthening prism 1, thickness is 27.5nm.Dielectric film 3 material selection polymkeric substance, its refractive index is 1.68, adopt the whirl coating method be plated in bottom surface metal film 2 below, thickness is 0.9 μ m.Reception promptly gets the P polarization of high-polarization or the laser beam of S polarization from the light beam of fibre- optical splice 7,9 outgoing.
Experiment and Theoretical Calculation show, if select for use from fibre-optical splice 6 incidents, receives from fibre-optical splice 7 and to export light, and polarizer of the present invention can reach more than the 42dB the extinction ratio of S ripple, and the insertion loss of P ripple is about 0.8dB; If select for use from fibre-optical splice 8 incidents, receive the output light from fibre-optical splice 9, polarizer of the present invention can reach more than the 54dB the extinction ratio of P ripple, and the insertion loss of S ripple is about 0.5dB.
Claims (7)
1, a kind of polarizer based on guided wave resonance, it is characterized in that constituting by lengthening prism (1), bottom surface metal film (2), dielectric film (3) and anti-reflection film (4), (5), lengthening prism (1), bottom surface metal film (2), dielectric film (3) from top to bottom are provided with, anti-reflection film (4), (5) are plated on (1) two side of lengthening prism, bottom surface metal film (2) and dielectric film (3) form single face metal-cladding waveguide structure, dielectric film (3) is a ducting layer, and bottom surface metal film (2) is a clad.
2, polarizer based on guided wave resonance according to claim 1, it is characterized in that importing and exporting fibre-optical splice (6), (7), (8) and (9) laser beam is imported or derives polarizer, wherein, fibre-optical splice (6), (7) with respect to lengthening prism (1) symmetry, fibre-optical splice (8), (9) with respect to lengthening prism (1) symmetry, its incident angle is respectively α and β, and respectively perpendicular to two planes on the every flank side surface of lengthening prism (1), prism (1) thus extends, bottom surface metal film (2) and dielectric film (3) form the attenuated total reflection structure, from fibre-optical splice (6), (8) guided wave that laser beam excited of incident is just propagated in dielectric film (3).
3, according to claim 1 and 2 described polarizers based on guided wave resonance, the prism (1) that it is characterized in that extending adopts the high index prism device, refractive index 1.4＜n＜3.0, the material of lengthening prism (1) is selected optical glass having high refractive index or crystalline material, the shape of lengthening prism (1) satisfies the incident laser light beam internal reflection more than twice or twice takes place on its bottom surface, and incident angle is operated near the guided wave resonance angle.
4, according to claim 1 or 3 described polarizers based on guided wave resonance, it is characterized in that extending and be coated with anti-reflection film (4) and (5) on the incident of prism (1) and the exit facet, the incident of lengthening prism (1) and exit facet are if adopt the folding face, then two plane respectively perpendicular to excite S ripple or P waveguide ripple resonance incident beam, promptly these two planes equal S ripple or P waveguide ripple resonance angle respectively to the inclination angle of bottom surface.
5, the polarizer based on guided wave resonance according to claim 1 and 2 is characterized in that bottom surface metal film (2) is selected for use operation wavelength is absorbed less metal, dielectric constant of metal ε=ε
r+ i ε
i, the thickness of bottom surface metal film (2) is between 15nm～60nm.
6, the polarizer based on guided wave resonance according to claim 5 is characterized in that metal species is chosen in the less metal of specific inductive capacity imaginary part in the operating wavelength range, its real part of permittivity ε
r≤-8.0, specific inductive capacity imaginary part ε
i≤ 15.0.
7, the polarizer based on guided wave resonance according to claim 1 and 2, the material that it is characterized in that dielectric film (3) adopts optical glass, oxide, crystalline material or polymkeric substance, it does not have absorption to the laser beam under the operation wavelength, and its refractive index is between 1.4～3.2, the thickness of dielectric film (3) is greater than 0.4 μ m, the thickness of bottom surface metal film (2) and dielectric film (3) satisfies the optimum coupling condition under selected optical maser wavelength, make guided wave resonance the strongest.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948747A (en) * | 2020-08-13 | 2020-11-17 | 山东理工大学 | High extinction ratio polarizer based on surface plasma |
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2003
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111948747A (en) * | 2020-08-13 | 2020-11-17 | 山东理工大学 | High extinction ratio polarizer based on surface plasma |
| CN111948747B (en) * | 2020-08-13 | 2023-03-14 | 山东理工大学 | High extinction ratio polarizer based on surface plasma |
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