CN111948747B - High extinction ratio polarizer based on surface plasma - Google Patents
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- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3066—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle
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Abstract
The invention discloses a surface plasma-based high extinction ratio polarizer. The polarizer element capable of converting incident light in any polarization state into linearly polarized light with high extinction ratio is obtained by arranging the interlayer structure consisting of the metal polarization extinction film, the glass sheet and the metal polarization extinction film on the surface of the inclined plane of the isosceles right triangular prism and covering the shading plate on the surface of the interlayer structure, so that the problems of large volume, high cost, complex process and the like of the traditional polarizer are solved, the polarizer has good color sensitivity and angle sensitivity, the extinction bandwidth of the polarization prism can be extended to the whole visible waveband, the requirements of device miniaturization and integration are met, and the large-scale commercial application is realized.
Description
Technical Field
The invention relates to the field of optical devices, in particular to a polarizer with high extinction ratio based on surface plasma.
Background
Surface plasmons are electromagnetic surface waves that exist at the interface between a metal and a medium, where the electric field is strongest and the electric field decays exponentially in the direction perpendicular to the interface. Surface plasmon resonance is a physical phenomenon in which free electrons in a metal form collective oscillations under excitation of an electric field of light waves and absorb the electric field of incident light waves, and at the same time, a photon resonance mode and a plasmon resonance mode are strongly coupled. Therefore, optical devices based on surface plasmon resonance are attracting increasing attention.
Polarization is one of the most important properties of optics, especially in the study of modern optics, including nonlinear optics and quantum optics. Linear optical components, such as polarizers and waveplates, are well suited for polarization manipulation. The traditional polarizing device mainly comprises a birefringent crystal and a polarizing plate, the working principle of the device is simple, and the process is mature. Existing polarization devices can also obtain linearly polarized light by absorbing a light field component in one of the directions, either by exploiting asymmetry in the light incident on the medium, or by distinguishing the characteristics of the two polarization states. Although a great deal of detailed research has been conducted, few polarizers having high extinction ratios and low costs are currently reported. With the development of surface plasmon research, such a polarizer based on surface plasmon resonance has been proposed and improved. Different from the traditional polarizing device, the polarizing device can meet the requirements of miniaturization and integration, and has the advantages of simple process, low cost, large bandwidth and high extinction ratio. Polarizers play an important role in communication and sensing as the most widely used optical coupling devices in surface plasmon resonance based research.
Disclosure of Invention
The invention aims to provide a high extinction ratio polarizer based on surface plasma, which is used for solving the problems of large volume, high cost, complex process and the like of the traditional polarizer, can extend the extinction bandwidth of a polarizing prism to the whole visible waveband, can convert incident light in any polarization state into linearly polarized light with high extinction ratio, is expected to be used for realizing advanced manufacturing technology, and can be used for optical components and polarization selection devices.
Fig. 1 is a schematic structural diagram of a polarizer element with high extinction ratio based on surface plasmon according to the present invention, and the principle of realizing polarization with high extinction ratio is as follows:
when incident light is incident at the interface of metal and high-refractive-index medium at a critical angle and is totally reflected, local surface plasmon resonance occurs on P polarized light at the interface, most energy is coupled and absorbed by the metal medium through the interface, local surface plasmon resonance does not occur on S polarized light at the interface, and almost all energy is reflected out.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
a polarizer element with high extinction ratio based on surface plasma comprises an isosceles right triangular prism, wherein the isosceles right triangular prism is provided with two right-angle surfaces with a right angle included angle and an inclined surface opposite to the right angle, the surface of the inclined surface of the isosceles right triangular prism is a sandwich structure consisting of a metal polarization extinction film, a glass sheet and a metal polarization extinction film, the surface of the sandwich structure is covered with a shading plate, and the refractive index of the glass sheet is the same as that of the isosceles right triangular prism.
In the above polarizer element, the triangular prism is an isosceles right triangular prism, and the included angle between the right-angled surface and the inclined surface is 45 °, as shown in fig. 1.
In the polarizer element, the metal polarization matting film is a nano metal film, which may be made of gold, silver, copper, aluminum, zinc, magnesium, or the like, and is preferably a gold film formed of gold nanoparticles, and has a thickness of 33 to 37nm.
In the above polarizer element, the thickness of the glass sheet is preferably 0.5 to 0.8mm.
In the above polarizer element, a surface of the light shielding plate in contact with the sandwich structure is preferably coated with a protective film, and the material of the light shielding plate may be a polycarbonate resin or the like; the protective film is polyacrylic resin and the like, and the thickness of the protective film is 0.4-0.6 mm.
When the polarizer element is prepared, the inclined plane of the triangular prism and one surface of the glass sheet are plated with the metal polarization extinction film at the same time, then the inclined plane of the triangular prism plated with the metal polarization extinction film is tightly attached to one surface of the glass sheet which is not plated with the metal polarization extinction film, and the surface of the glass sheet plated with the metal polarization extinction film is tightly attached to the shading plate. The polarizer element may be obtained by coating the perimeter with a small amount of adhesive liquid and applying a pressure to bring the two into close proximity. The adhesive liquid is high-purity fluorescence-free mirror oil, the component material is cedar oil, the cedar oil has viscosity, and the refractive index of the cedar oil is the same as that of a right-angle triangular prism and a glass sheet.
When the inclined plane of the triple prism and the surface of the glass sheet are plated with the nano metal film, methods such as vacuum evaporation, magnetron sputtering, an explosion wire method, an evaporation method, a gas phase chemical reaction and the like can be adopted.
A high extinction ratio polarizer based on surface plasma is formed by utilizing a plurality of polarizer elements with high extinction ratio, the structure of the polarizer is shown in figure 2 and comprises N polarizer elements, wherein N is an integer larger than 1, preferably N is larger than or equal to 4, the N isosceles right triangular prisms are sequentially arranged into a long strip structure through right angle surfaces in an attaching mode, except for the first right triangular prism and the last right triangular prism, the two right angle surfaces of each right triangular prism are respectively attached to the right angle surfaces of the two right triangular prisms arranged in front of and behind the right triangular prism, the inclined surfaces of the right triangular prisms form two opposite side surfaces of the long strip structure, a sandwich structure consisting of a metal polarization extinction film, a glass sheet and a metal polarization extinction film is arranged on the two side surfaces, and the outer surface of the sandwich structure is covered with a shading plate.
When the high extinction ratio polarizer is prepared, the metal polarization extinction films are plated on the inclined planes of all the right-angle triple prisms and one surfaces of the two large glass sheets; then the right-angle triangular prisms are arranged into a long strip-shaped structure, and the inclined surfaces of the right-angle triangular prisms form two opposite side surfaces of the long strip-shaped structure; and respectively and tightly attaching the surfaces of the two glass sheets which are not plated with the metal polarization extinction films to the metal polarization extinction films on the two side surfaces, and tightly attaching the surfaces of the glass sheets which are plated with the metal polarization extinction films to the shading plate to obtain the high extinction ratio polarizer. Or, preparing the polarizer element with high extinction ratio of the sandwich structure consisting of the metal polarization extinction film, the glass sheet and the metal polarization extinction film on the inclined surface of the right-angle triple prism as described above, and then closely arranging the right-angle surfaces of the polarizer elements into the polarizer with high extinction ratio of the long strip structure. Wherein, two adjacent right-angle triple prisms are bonded by the adhesive liquid with the same refractive index as that of the right-angle triple prisms, so that the light loss is reduced when the light passes through.
In the above-mentioned high extinction ratio polarizer, a light shielding plate coated with a protective film is disposed at the outermost layer to prevent interference of external light.
As a preferable scheme, gold nanoparticles are directly deposited on the inclined plane of the right-angle triple prism and one surface of the glass sheet, and a nano gold film is formed by stacking, wherein the thickness of the gold film is 33-37nm, so that the metal polarization extinction film is obtained. The interlayer structure has the advantages that the layers are tightly attached, so that interference of impurity pollution caused by a medium gap or a transfer process after the two layers are bonded on incident light can be effectively avoided, and polarization errors are reduced.
As a preferable scheme, the surface plasmon resonances of the gold nanoparticles with different sizes can present a dipole resonance mode and enhance the strength of a nearby electric field, so that the size has a very important influence on the surface plasmon resonance of the gold nanostructure, and the surface plasmon resonance of the gold film can be regulated and controlled by adjusting the size of the gold nanoparticles, so as to achieve a better polarization absorption effect. The particle size of the gold nanoparticles is preferably in the range of 6-10 nm, and the gold nanoparticles have good polarization absorption effect; below or above this range, the polarization absorption effect is reduced.
Preferably, a quartz strip with a certain length, width and height is used to replace the strip polarizer composed of a plurality of right-angled triangular prisms, for example, 80mm × 5mm × 10mm is the quartz strip. As shown in FIG. 3, the cross section of the quartz strip is rectangular, a sandwich structure consisting of a metal polarization extinction film-a glass sheet-a metal polarization extinction film is arranged on two opposite sides of the quartz strip, and the surface of the sandwich structure is covered with a shading plate. And adjusting the included angle between the incident light and the incident surface, so that the incident light is totally reflected for multiple times in the quartz strip to realize the polarized absorption of the P polarized light and the total reflection of the S polarized light by the metal polarized extinction film.
The invention designs a polarizer with high extinction ratio according to the local plasma resonance characteristic of metal. The polarizer with high extinction ratio based on the surface plasma has better color sensitivity and angle sensitivity, namely, the polarizer has high sensitivity to the angle of incident light in a visible light waveband; the polarizer of the invention can work in the range of visible light wave band, especially at 632.8nm, the polarized absorption rate of P polarized light is as high as 95%, and the extinction ratio reaches tens of thousands of orders.
Compared with the traditional polarizing device, the high extinction ratio polarizer based on the surface plasma provided by the invention can meet the requirements of miniaturization and integration, the preparation process is simple, the precision of linearly polarized light is improved, the large-scale commercial application is accelerated, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of the structure of a sandwich structured polarizer element of the present invention, wherein: 1-triangular prism, 2-gold film, 3-glass sheet, 4-light screen.
FIG. 2 is a schematic diagram of a polarizer comprised of four sandwich polarizer elements.
FIG. 3 is a schematic diagram of a polarizer with high extinction ratio using a quartz bar of a specific size coated with gold films on both sides.
Fig. 4 is a scanning electron microscope photograph of the nano-gold film prepared in example 1, and the gold film deposited by the low vacuum sputtering method has good surface continuity, uniformity and no impurities.
Fig. 5 is an atomic force microscope image of the nano gold film prepared in example 1, and characterizes that the thickness of the gold film is 33 to 37nm.
FIG. 6 shows the variation of the reflection intensity of S-and P-polarized light with the incident angle in example 4, where the wavelength of the incident light is 632.8nm, the thickness of the gold film in the sandwich structure is 33-37nm and the refractive index n =0.48263+3.4253i.
Detailed Description
The process for producing the polarizer element having a sandwich structure and the process for testing a polarizer having a high extinction ratio in the present invention will be described in detail with reference to the accompanying drawings by way of specific examples.
Example 1: preparation of Single Sandwich polarizer elements
The structure of the polarizer element with a sandwich structure prepared in this example is shown in fig. 1, a sandwich structure composed of a gold film 2 and a glass sheet 3 is prepared on the inclined surface of an isosceles right triangular prism 1, and the surface of the outer gold film is closely attached to a light shielding plate 4. Wherein, the refractive index n1=1.51 of the base material triangular prism, the refractive index n =0.48263+3.4253i of the gold film, and the refractive index n2=1.51 of the glass sheet. The single sandwich polarizer element was prepared as follows:
1) Ultrasonically cleaning an isosceles right triangular prism for 5min by isopropanol, acetone and deionized water in sequence, and drying by using inert gas nitrogen;
2) Putting the cleaned and dried isosceles right-angle triangular prism into a low-vacuum sputtering device after cleaning and wiping;
3) Adjusting the placement and position of the isosceles right triangular prism, and enabling the inclined plane opposite to the right angle to face the sputtering target opening and be 3-4cm away from the sputtering target opening;
4) Placing two glass sheets at the same position, wherein one glass sheet is subsequently used for being attached to the inclined surface of the right-angle triangular prism in a clinging manner, and the other glass sheet is used for replacing a gold film deposited on the right-angle triangular prism in the same environment for representation;
5) Setting the sputtering time of low vacuum sputtering equipment to be 70s, the air pressure during sputtering to be 4-3Pa and the plasma current to be about 10mA, and carrying out sputtering deposition on a gold film;
6) After the gold film is sputtered and deposited, taking out the right-angle triple prism and one of the glass sheets for designing a polarizing device, and representing the gold film on the other glass sheet;
7) Placing the glass sheet with the single surface plated with the gold film between the right-angle triple prism and the shading plate, wherein the surface of the glass sheet which is not plated with the gold film is tightly adhered to the inclined surface of the right-angle triple prism which is plated with the gold film, the surface of the glass sheet which is plated with the gold film is tightly adhered to the shading plate, and a small amount of adhesive liquid is coated on the periphery and is applied with certain pressure to enable the glass sheet to be tightly adhered to the shading plate;
8) The preparation of a single sandwich polarizer element was completed.
Atomic force microscope and scanning electron microscope tests were performed on the gold film, and as shown in fig. 4 and 5, the surface continuity of the gold film deposited by the low vacuum sputtering method of the present invention was good and uniform, and the thickness of the gold film was determined to be about 33 to 37nm.
Example 2: single sandwich polarizer element operation
Example 1 a single sandwich-structured polarizer element was prepared as shown in fig. 1, and comprised an isosceles right triangular prism 1, a glass sheet 3 and a shadow mask 4, wherein the inclined surface of the isosceles right triangular prism 1 and one surface of the glass sheet 3 were coated with a nano-gold film, the shadow mask 4 was made of a polycarbonate resin material, and the surface thereof was coated with a protective film of a polyacrylic resin material having a thickness of 0.5 mm. The included angle between the right-angle surface of the right-angle triangular prism 1 and the inclined surface is 45 degrees, and the surface of the glass sheet 3 which is not plated with the nano-gold film is tightly adhered to the inclined surface of the right-angle triangular prism 1The side of the shading plate 4 coated with the protective film is tightly adhered to the side of the glass sheet 3 plated with the nano-gold film. When the incident light is at a certain incident angle theta 1 The light passes through a right-angle surface of the right-angle triple prism 1 and is incident on the inclined surface, and then is incident on the gold film plated on the inclined surface, total reflection occurs, local surface plasma resonance of the gold film is caused, then most of S polarized light in the incident light is reflected, P polarized light is coupled and absorbed by the gold film, a small part of S polarized light and P polarized light are transmitted, the transmitted light is incident on the gold film through the glass sheet 3 again, a small part of S polarized light in the transmitted light is reflected again, the P polarized light is coupled and absorbed by the gold film on the glass sheet again, finally, the S polarized light in the incident light is reflected, and the P polarized light is coupled and absorbed by the gold film, so that high extinction ratio polarization absorption of the P polarized light is realized.
The incident angle theta refers to an included angle between incident light entering the triangular prism and a vertical plane on the inclined plane of the triangular prism, and when theta is about 45 degrees, namely about 4 degrees after a critical angle, P polarized light reflected at the moment is the smallest, so that the largest polarization extinction ratio is obtained.
Example 3: polarizer comprising a plurality of sandwich-structured polarizer elements
As shown in fig. 2, the polarizer structure of this embodiment includes two each of N right-angled triangular prisms, and glass sheets and light-shielding plates with corresponding lengths, and in order to ensure a large extinction ratio and a good polarization absorption effect, preferably N is greater than or equal to 4, the inclined surfaces of the N right-angled triangular prisms are plated with a gold film, one surface of a glass sheet with a certain length is also plated with a gold film, the N right-angled triangular prisms are arranged as shown in fig. 2, that is, the right-angled surfaces of two adjacent right-angled triangular prisms are opposite, and the right-angled surfaces of the two right-angled triangular prisms are tightly attached by cedar oil material adhesive liquid with the same refractive index as that of the right-angled triangular prisms, and the inclined surfaces of the right-angled triangular prisms are located at both sides; and tightly attaching the surfaces of the two glass sheets which are not plated with the gold films to two sides formed by the inclined surfaces of the N right-angle triple prisms after the combination together, and tightly attaching the surfaces of the glass sheets which are plated with the gold films to the shading plate. When incident light enters the inclined plane of the first right-angle triple prism and then enters the gold film plated on the inclined plane, total reflection occurs, local surface plasma resonance of the gold film is caused, then most S polarized light in the incident light is reflected, P polarized light is coupled and absorbed by the gold film, a small part of S polarized light and P polarized light are transmitted, the transmitted light enters the gold film through the glass sheet, a small part of S polarized light in the transmitted light is reflected again, the P polarized light is coupled and absorbed by the gold film on the glass sheet again, but a small part of P polarized light is reflected in the whole process; and the P polarized light is almost completely coupled and absorbed by a gold film medium after regularly reflected light passes through N polarizer elements with interlayer structures through the polarization absorption process which is the same as that of the first right triangular prism, and finally the output of the S polarized light with high extinction ratio is realized.
Example 4: testing process of high extinction ratio polarizer based on surface plasma
1) A light path is built, a 632.8nm continuous helium-neon laser is adopted to provide a light source, and a polarization beam splitter prism is used for adjusting incident light into any polarization state;
2) Firstly, modulating incident light into S polarized light by using a polarization beam splitter prism, and measuring the incident power to be 3.32mW;
3) P-polarized light is incident into a polarizer composed of 4 polarizer elements at an incident angle θ of about 45 °, and local surface plasmon resonance occurs at the interface of the inclined plane of the right triangular prism and the gold film;
4) Measuring the power of light reflected from the polarizer by a power meter, which is different from the power of incident light by 4 orders of magnitude and is 172nW;
5) Repeating the step 2), but using S polarized light, and measuring the incident power to be 3.35mW;
6) The S polarized light enters the polarizer at the same incident angle as the P polarized light, and local surface plasma resonance does not occur at the interface of the inclined plane of the right-angle triple prism and the gold film;
7) The power of the light reflected from the polarizer was measured using a power meter, almost similar to the power of the incident light, and was 3.20mW;
8) And (5) repeating the step 2), adjusting the incident light into any polarization state, wherein the reflected light coming out of the polarizer is almost S-polarized light and has high extinction ratio.
Fig. 6 shows the variation of the reflection intensity of the S-polarized light and the P-polarized light with the incident angle, wherein the wavelength of the incident light is 632.8nm, the thickness of the gold film is 33-37nm, and the refractive index n =0.48263+3.4253i. As can be seen from fig. 6, when the incident angle θ is about 45 °, the P-polarized light has a smaller reflectivity, that is, the power of the light reflected by the P-polarized light tends to 0, and then the polarization device has the best absorption performance for the P-polarized light; the reflectivity fall of the S polarized light and the P polarized light is maximum under the same incident angle, namely the maximum polarization extinction ratio is obtained by comparing the power of the S polarized light and the power of the P polarized light.
Claims (6)
1. A high extinction ratio polarizer element based on surface plasma comprises an isosceles right triangular prism, wherein the isosceles right triangular prism is provided with two right-angle surfaces with an included angle being a right angle and an inclined surface opposite to the right angle; the thickness of the glass sheet is 0.5 to 0.8 mm; the metal polarization extinction film is a gold film with the thickness of 33-37nm formed by gold nanoparticles with the particle size of 6-10 nm; when incident light penetrates through one right-angle surface of the isosceles right triangular prism at a certain incident angle and is incident on the inclined surface, the incident light is incident on the gold film plated on the inclined surface, total reflection occurs at the inclined surface, local surface plasma resonance of the gold film is caused, then most S polarized light in the incident light is reflected, P polarized light is coupled and absorbed by the gold film, a small part of S polarized light and P polarized light are transmitted, the transmitted light is incident on the gold film through the glass sheet again, a small part of S polarized light in the transmitted light is reflected again, the P polarized light is coupled and absorbed by the gold film on the glass sheet again, finally the S polarized light in the incident light is reflected, and the P polarized light is coupled and absorbed by the gold film, so that high extinction ratio polarization absorption of the P polarized light is realized.
2. The polarizer element of claim 1 wherein the side of the mask in contact with the sandwich structure is coated with a protective film.
3. The method of making a polarizer element of claim 1~2 wherein said polarizer element is made by plating a metal polarizing and matting film on the bevel of said isosceles right triangular prism and on one side of said glass sheet, and then bringing said metal polarizing and matting film plated bevel of said isosceles right triangular prism into close contact with the side of said glass sheet not plated with said metal polarizing and matting film, and said metal polarizing and matting film plated side of said glass sheet into close contact with a light shield.
4. A high extinction ratio polarizer based on surface plasma comprises N isosceles right triangular prisms, wherein N is an integer larger than 1, the isosceles right triangular prisms are provided with two right-angle surfaces with right angles and inclined surfaces opposite to the right angles, and the polarizer is characterized in that the N isosceles right triangular prisms are sequentially arranged into a long strip structure through the right-angle surfaces, except the first and the last isosceles right triangular prisms, the two right-angle surfaces of each isosceles right triangular prism are respectively attached to the right-angle surfaces of the two isosceles right triangular prisms arranged in front of and behind the isosceles right triangular prism, the inclined surfaces of the isosceles right triangular prisms form two opposite side surfaces of the long strip structure, a sandwich structure consisting of a metal polarization extinction film, a glass sheet and a metal polarization extinction film is arranged on the two side surfaces, the outer surface of the sandwich structure is covered with the sandwich structure, the metal polarization extinction film is a nano metal film, the refractive index of the glass sheet is the same as that of the isosceles right triangular prisms, the thickness of the glass sheet is 0.5 to 0.8mm, and the metal polarization extinction film is a 3262-3238 gold shading plate formed by 6 to 10 z3238 zft particles; when incident light enters the inclined plane of the first isosceles right triangular prism and then enters the gold film plated on the inclined plane, total reflection occurs, local surface plasma resonance of the gold film is caused, then most S polarized light in the incident light is reflected, P polarized light is coupled and absorbed by the gold film, a small part of S polarized light and P polarized light are transmitted, the transmitted light enters the gold film through the glass sheet, a small part of S polarized light in the transmitted light is reflected again, the P polarized light is coupled and absorbed by the gold film on the glass sheet again, but a small part of P polarized light is reflected in the whole process; and the reflected light passes through N sandwich-structured polarizer elements according to the rule after passing through the second isosceles right triangular prism, is incident on the inclined plane of the second isosceles right triangular prism and is incident on the gold film plated on the inclined plane, and finally the S polarized light with high extinction ratio is output after passing through the polarization absorption process which is the same as that of the first isosceles right triangular prism.
5. The polarizer according to claim 4, wherein N is 4 or more, and two adjacent isosceles right triangular prisms are bonded together by a bonding liquid having a refractive index equal to that of the isosceles right triangular prisms.
6. The polarizer according to claim 4, wherein a side of the light-shielding plate in contact with the sandwich structure is coated with a protective film.
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| US6330062B1 (en) * | 1999-04-30 | 2001-12-11 | Wisconsin Alumni Research Foundation | Fourier transform surface plasmon resonance adsorption sensor instrument |
| CN1434325A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Polarization method for generating single polarization |
| CN1434311A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Polarizer based on guided wave resonance |
| WO2015159726A1 (en) * | 2014-04-14 | 2015-10-22 | 岡本硝子株式会社 | Cube-shaped polarized beam splitter module |
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| CN2533477Y (en) * | 2002-01-24 | 2003-01-29 | 邵剑心 | High extinction ratio polarization prism spectrometer |
| US10824011B2 (en) * | 2017-01-04 | 2020-11-03 | Samsung Electronics Co., Ltd. | Photoluminescent polarizers having metal film with surface plasmon coupling and electronic devices including the same |
| CN109148673A (en) * | 2018-08-31 | 2019-01-04 | 京东方科技集团股份有限公司 | Quantum dot film, quantum dot light emitting component and display device |
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|---|---|---|---|---|
| US5151956A (en) * | 1991-12-20 | 1992-09-29 | The United Staes Of America As Represented By The Secretary Of The Army | Waveguide polarizer using localized surface plasmons |
| US6330062B1 (en) * | 1999-04-30 | 2001-12-11 | Wisconsin Alumni Research Foundation | Fourier transform surface plasmon resonance adsorption sensor instrument |
| CN1434325A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Polarization method for generating single polarization |
| CN1434311A (en) * | 2003-02-27 | 2003-08-06 | 上海交通大学 | Polarizer based on guided wave resonance |
| WO2015159726A1 (en) * | 2014-04-14 | 2015-10-22 | 岡本硝子株式会社 | Cube-shaped polarized beam splitter module |
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