CN208738306U - A kind of circularly polarized light detector based on Schottky barrier - Google Patents
A kind of circularly polarized light detector based on Schottky barrier Download PDFInfo
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- CN208738306U CN208738306U CN201821674197.7U CN201821674197U CN208738306U CN 208738306 U CN208738306 U CN 208738306U CN 201821674197 U CN201821674197 U CN 201821674197U CN 208738306 U CN208738306 U CN 208738306U
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- polarized light
- circularly polarized
- schottky barrier
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- light detector
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Abstract
The utility model relates to a kind of circularly polarized light detector based on Schottky barrier, including electrode layer, transparent dielectric layer is provided with above the electrode layer, organic material is provided with above the transparent dielectric layer, the first electrode being spaced each other, second electrode are provided with above the organic material, the first electrode is chiral structure；The circularly polarized light detector based on Schottky barrier, existing optothermal detector is solved in the presence of lower to the absorptivity of circularly polarized light, the slower problem of detector response speed, by the incidence for detecting the circularly polarized light of different frequency, change caused by Schottky barrier, to judge the direction of circularly polarized light；On the other hand, the circularly polarized light absorption frequency of different frequency is different, the frequency of circularly polarized light can also be adjusted by detecting electric current, so that the highest circularly polarized light of absorptivity is matched with the optics thermal detector.
Description
Technical field
The present invention relates to photodetector technical fields, and in particular to a kind of circularly polarized light detection based on Schottky barrier
Device.
Background technique
The physical effect of photodetector is generally divided into photon effect and photo-thermal effect, and corresponding detector is referred to as light
Subtype detector and photo-thermal type detector.The common trait of various photon type detectors is using semiconductor energy carrying material, photon
Energy has generated directly effect to photoelectronic in detection material, therefore photon type detector has cut-off response frequency or wavelength,
And spectral response is limited to a certain wave band, therefore different material systems determines that detector has different response wave length scopes,
Generally it is difficult to use in wide range or multispectral section of detection.Photo-thermal type detector is not caused directly after absorbing optical radiation energy
The change of internal electron state, but the luminous energy of absorption is become the energy of thermal motion of lattice, cause detecting element temperature to rise,
It changes so as to cause the electrical properties of detecting element or other physical properties, therefore the size of photo-thermal effect and photon energy does not have
There is direct relation, photo-thermal type detector is in principle to frequency without selectivity.Due to infrared band especially in LONG WAVE INFRARED with
The photo-thermal effect of upper wave band becomes apparent from compared to Uv and visible light, therefore optothermal detector is commonly used in the spy of middle long wave optical radiation
It surveys, typical photo-thermal type detector includes the types such as micro-metering bolometer, pyroelectric detector and thermocouple detector.Due to temperature
Raising is the effect of heat accumulation, and the general response speed of thermal detector based on photo-thermal effect is slower, in millisecond magnitude.
However, existing optothermal detector be primarily used to detection light intensity, main improvement direction be also embodied in as
In terms of the intensity of the light of what detection, the detection in circularly polarized light direction can not be carried out.
Summary of the invention
In view of the above-mentioned problems, present invention aim to address the spies that existing optothermal detector can not carry out circularly polarized light direction
The problem of survey.For this purpose, the present invention provides a kind of circularly polarized light detector based on Schottky barrier, including electrode layer, it is described
It is provided with transparent dielectric layer above electrode layer, organic material, the organic material are provided with above the transparent dielectric layer
Top be provided with the first electrode being spaced each other, second electrode, the first electrode is chiral structure.
The first electrode is the metal conductive film that hole is arranged.
Semiconductor layer is additionally provided at left and right sides of the metal conductive film.
Described hole is Z-shaped, and middle part has metal wire to pass through.
Described hole is combined into continuous Z-shaped for the rectangle of connection.
The angle of described hole and the angle α of horizontal direction is 22.5 °.
L shape metal strip is provided in described hole.
The both ends of the L shape metal strip and the both sides of hole connect, and constitute rectangle.
The first electrode is the spiral of Archimedes that conductive metal is constituted.
The circle number of the spiral of Archimedes is 2~8.
Beneficial effects of the present invention: this circularly polarized light detector based on Schottky barrier provided by the invention solves
Existing optothermal detector exists lower to the absorptivity of circularly polarized light, and the slower problem of detector response speed passes through inspection
The incidence for surveying the circularly polarized light of different frequency, changes caused by Schottky barrier, to judge the direction of circularly polarized light；It is another
The circularly polarized light absorption frequency of aspect, different frequency is different, can also adjust the frequency of circularly polarized light by detecting electric current, so that
The highest circularly polarized light of absorptivity is matched with the optics thermal detector.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the circularly polarized light detector structural schematic diagram based on Schottky barrier.
Fig. 2 is the circularly polarized light detector structure top view one based on Schottky barrier.
Fig. 3 is the circularly polarized light detector structure top view two based on Schottky barrier.
Fig. 4 is the circularly polarized light detector structure top view three based on Schottky barrier.
Fig. 5 is the circularly polarized light detector structure top view four based on Schottky barrier.
Fig. 6 is the circularly polarized light detector structure top view five based on Schottky barrier.
Fig. 7 is circular dichroism schematic diagram of the hole in the case where circularly polarized light is incident.
In figure: 1, electrode layer；2, transparent dielectric layer；3, organic material；4 first electrodes；5, second electrode；6, hole；7,
Metal strip；8, metal wire；9, semiconductor layer.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied to a specific embodiment of the invention, structure feature and its effect, detailed description are as follows.
Embodiment 1
In order to solve the problems, such as that existing optothermal detector can not carry out the detection in circularly polarized light direction.The present invention provides one
The kind circularly polarized light detector based on Schottky barrier as shown in Figure 1, including electrode layer 1, the top of the electrode layer 1 are set
It is equipped with transparent dielectric layer 2, the top of the transparent dielectric layer 2 is provided with organic material 3, the top setting of the organic material 3
There are the first electrode 4 being spaced each other, second electrode 5, the first electrode 4 is chiral structure.Electrode layer 1 is equivalent to grid, energy
The effect for enough regulating and controlling voltage status between first electrode 4, second electrode 5, forms Xiao Te between first electrode 4 and organic material 3
Schottky barrier is formed between base potential barrier, second electrode 5 and organic material 3, when different circularly polarized lights is incident on first electrode 4
When upper, different electric fields can be generated from 3 contact surface of machine material in an electrode 4, to influence first electrode 4 and organic material 3
Between Schottky barrier, by detection Schottky barrier variation, to react the characteristic of circularly polarized light.
As shown in Fig. 2, in order to preferably react the characteristic of circularly polarized light, above-mentioned first electrode 4 can be to be provided with hole 6
Metal conductive film, film main function be it is conductive, generate electric field, the main function of hole 6 is to generate chiral characteristic, so that circle is inclined
Vibration light generates different electric fields, and then influences between first electrode 4 and organic material 3 and form Schottky barrier, to detect
The variation of Schottky barrier, to show the characteristic of circularly polarized light.In order to enable hole 6 influences the bright of field distribution better effect
Aobvious, above-mentioned hole 6 can be set to rectangle, and the rectangular hole 6 and horizontal direction be there are certain angle α,
The range of angle α is within the scope of 0-180 °, preferential selection, and the angle of angle α is 22.5 °, and the size of hole 6 is according to being wanted
The frequency of the circularly polarized light of detection is determined, and generated electric field is most by force to be most suitable, for example, when hole 6 is dimensioned to
Long 400nm, wide 200nm, such size can have optimal circular dichroism to wavelength X=670nm circularly polarized light.
As shown in figure 3, being provided with L shape metal strip 7 in described hole 6, and the both ends of L shape metal strip 7 and the two of hole 6
Side connection constitutes rectangle, and the two-arm height of L shape metal strip 7 is identical, and width, length may be the same or different, and L is arranged
Shape metal strip 7 be another chiral structure design, it is similar with using angle by the way of, also for realization chiral structure,
Such as hole 6 is dimensioned to long 400nm, the height of wide 200nm, L shape metal strip 7 are identical as 6 height of hole, are
The width of 30nm, L shape metal strip 7 is set as 30nm, a side length 200nm of L shape metal strip 7, another side length 120nm, this
The size of sample can have optimal circular dichroism to wavelength X=770nm circularly polarized light.
As shown in figure 4, the first electrode 4 is the spiral of Archimedes that conductive metal is constituted, the Archimedian screw
Line with a thickness of 10-30nm, it is contemplated that light transmission features, it is preferential to can choose 10nm, 15nm, it is described under circularly polarized light is incident
Spiral of Archimedes will form electric field, and then influences between first electrode 4 and organic material 3 and form Schottky barrier, this
Sample can detect the variation of Schottky barrier, to show the characteristic of circularly polarized light, it should be noted that generated electric field is most
It is by force most suitable, the circle number of the spiral of Archimedes, start radius, helix spacing, line width, it can be according to be detected
The frequency of circularly polarized light is determined, so that the frequency of circularly polarized light can be most strong with the generation of spiral of Archimedes structure
Magnetic field, to influence Schottky barrier；The circle number of general spiral of Archimedes is 2~8, preferential selection, Archimedes
The circle number of helix is 5, can set start radius, helix spacing, line width on this basis.
It is continuous Z-shaped that described hole 6 is that the rectangle of connection is combined into, can be by first electrode since hole 6 is continuous through-hole
4 are divided into disjunct several parts, different electrodes can be being linked to various pieces, to enhance their electric field effect
Fruit, and then more obvious influence is generated to Schottky barrier, by detecting the variation of Schottky barrier, Lai Fanying incident light
Circular dichroism characteristic.As shown in figure 5, the hole 6 circularly polarized light incidence in the case where, bimodal can be generated as shown in fig. 7,
Wavelength X=610nm, λ=680nm generate the peak value of 2 circular dichroism, when the peak value of λ=610nm is close to 0.07, when λ=
The peak value of 680nm is close to 0.15.
As shown in fig. 6, being additionally provided with semiconductor at left and right sides of metal conductive film described in another structure of described hole 6
Layer 9；Described hole 6 is that multiple points are disposed in parallel Z-shaped, and middle part has metal wire 8 to pass through；This is also the one of first electrode 4
Kind chiral structure design, the metal wire 8 are made of gold or this noble metal of silver, are mainly to provide good electric conductivity, practical
In application, on-load voltage, two semiconductor layers 9 different voltage can be loaded on metal wire 8, semiconductor layer 9, so that
Chirality characteristic caused by first electrode 4 is more obvious, can influence to the greatest extent first electrode 4 with organic material 3
Between Schottky barrier, as long as detection Schottky barrier variation, so that it may the circular dichroism of the circularly polarized light of research institute's incidence
Property.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of circularly polarized light detector based on Schottky barrier, including electrode layer (1), set above the electrode layer (1)
It is equipped with transparent dielectric layer (2), is provided with organic material (3) above the transparent dielectric layer (2), it is characterised in that: described to have
The first electrode (4) being spaced each other, second electrode (5) are provided with above machine material (3), the first electrode (4) is chirality
Structure.
2. a kind of circularly polarized light detector based on Schottky barrier as described in claim 1, it is characterised in that: described first
Electrode (4) is the metal conductive film that hole (6) are arranged.
3. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 2, it is characterised in that: the metal
Semiconductor layer is additionally provided at left and right sides of conductive film.
4. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 2, it is characterised in that: described hole
It (6) is Z-shaped, and middle part has metal wire (8) to pass through.
5. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 2, it is characterised in that: described hole
(6) it is combined into for the rectangle of connection continuous Z-shaped.
6. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 5, it is characterised in that: described hole
It (6) is 22.5 ° with the angle of the angle α of horizontal direction.
7. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 2, it is characterised in that: described hole
(6) L shape metal strip (7) is provided in.
8. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 7, it is characterised in that: the L shape
The both ends of metal strip (7) are connect with the both sides of hole (6), constitute rectangle.
9. a kind of circularly polarized light detector based on Schottky barrier as described in claim 1, it is characterised in that: described first
Electrode (4) is the spiral of Archimedes that conductive metal is constituted.
10. a kind of circularly polarized light detector based on Schottky barrier as claimed in claim 9, it is characterised in that: Ah
The circle number of base Mead helix is 2~8.
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| CN201821674197.7U CN208738306U (en) | 2018-10-16 | 2018-10-16 | A kind of circularly polarized light detector based on Schottky barrier |
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| CN201821674197.7U CN208738306U (en) | 2018-10-16 | 2018-10-16 | A kind of circularly polarized light detector based on Schottky barrier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007387A (en) * | 2019-04-24 | 2019-07-12 | 金华伏安光电科技有限公司 | A kind of optical texture enhancing circularly polarized light circular dichroism |
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2018
- 2018-10-16 CN CN201821674197.7U patent/CN208738306U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007387A (en) * | 2019-04-24 | 2019-07-12 | 金华伏安光电科技有限公司 | A kind of optical texture enhancing circularly polarized light circular dichroism |
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