A high-precision linear polarization information measuring device

Abstract

The application discloses a high-precision linear polarization information measuring device, and relates to the technical field of semiconductor linear polarization light information measurement. The device comprises a detection unit module, a voltage processing module and a calculation and output module. Two groups of four detectors are connected in series through a circuit, and the maximum polarization sensitive directions of the two groups of detectors are 45 degrees apart. When linear polarization light irradiation occurs under a certain power supply bias, the detection unit module generates two voltage signals, and the generated voltage signals are only related to a polarization angle. The two voltage signals pass through the voltage processing module, and a voltage signal filtered from common mode interference is obtained through a programmed gain voltage amplifier and a difference processing circuit. Finally, the processed voltage signal is transmitted to the calculation and output module. A calculation unit in the module processes and transmits the processed voltage signal to a display device through communication, so that visual linear polarization information is obtained.

Description

Technical Field

[0001] This invention relates to the field of semiconductor linear polarization light information measurement technology, and more specifically to a high-precision linear polarization information measurement device. Background Technology

[0002] Light, as a type of electromagnetic wave, is composed of electric and magnetic field vectors that propagate across space. Light is also a transverse wave, with the vibration directions of its electric and magnetic field vectors orthogonal to the direction of light propagation. Since the photoelectric effect and human vision are both manifestations of the interaction between the electric field vectors of matter and light, the electric field vector of light waves is also called the light vector. Generally, for natural light, the vibration direction of the electric field vector is statistically uniformly distributed. When natural light is reflected or refracted at the surface of an object, this uniform distribution of the electric field vector vibration direction changes, producing directions with a higher probability of distribution; this phenomenon is called light polarization. Therefore, the polarization of light can reveal some characteristics of an object, which is beyond the capabilities of traditional photodetectors. Thus, detecting the linear polarization information of light can further reveal details of the detected object and can be applied in a wider range of fields.

[0003] Currently, to address the challenge of miniaturizing traditional linearly polarized photodetectors, two-dimensional anisotropic semiconductors are commonly used for detecting linearly polarized light. Because the in-plane anisotropy of two-dimensional anisotropic semiconductors is sensitive to linearly polarized light, they can directly detect polarized light without complex optical components, offering significant advantages in the miniaturization of linearly polarized photodetectors. The detection mechanism is as follows: under incident light of a certain wavelength and power, changing the linear polarization state alters the conductivity of the two-dimensional anisotropic semiconductor, resulting in different photocurrents, which reflect the linear polarization angle of the incident light wave. However, this method currently faces several challenges: 1. The wavelength and power of the incident light must remain constant during measurement, as the conductivity of the two-dimensional semiconductor material changes with the wavelength and power of the incident light; 2. Common two-dimensional materials have relatively low anisotropy, making the signal easily susceptible to environmental noise during current transmission (since environmental noise has the same interference voltage amplitude on the same substrate detector, it is also called common-mode interference), reducing the accuracy of signal recognition; 3. Numerical analysis of the photocurrent using a semiconductor analyzer is not convenient or intuitive. Summary of the Invention

[0004] In view of this, the present invention provides a high-precision linear polarization information measurement device to solve current difficulties and achieve convenient, fast, and accurate measurement. Firstly, based on the characteristics of a linear polarization detector made of two-dimensional semiconductor material, a detection unit module is constructed to obtain two voltage values ​​that are only related to the angle of linearly polarized light. Secondly, to obtain more refined angle information, an amplification processing module is used to filter common-mode noise interference. Finally, the processed voltage signal is input to a calculation and output module to quickly obtain the polarization information of the detected incident light.

[0005] To achieve the above objectives, the first aspect of the present invention provides a high-precision linear polarization information measurement device that outputs information only related to the polarization angle: it includes two sets of detection units, each set of detection units consisting of linear polarization detectors connected in series with a 45° angular difference in the maximum linear polarization light sensitivity angle to obtain two voltage values ​​that are only related to the linear polarization light angle. The output voltage of each set of detection units is connected to an amplification processing module to filter common-mode noise interference. That is, the output voltage of each set of detection units is connected to a voltage amplifier, and the two amplified voltages are connected to a difference processor for difference processing. The processed voltage signals are then connected to a calculation and output module to quickly obtain the polarization information of the detected incident light.

[0006] In operation, the detection unit module first receives the incident light simultaneously through two sets of detection units. Within each set, linear polarization detectors with a 45° difference in the maximum linear polarization light sensitivity angle are connected in series, with the current transmission direction consistent with the reference direction.

[0007] Preferably, one set of detection units consists of detector 1 and detector 2 connected by a metal lead 1, and the other set of detection units consists of detector 3 and detector 4 connected by a metal lead 2. The first metal source electrode corresponding to detector 1 and the first metal source electrode corresponding to detector 3 are both connected to ground. The first metal drain electrode corresponding to detector 1 is electrically connected to the second metal source electrode corresponding to detector 2, and is also connected to the metal lead 1, which serves as voltage output node 1. The third metal drain electrode corresponding to detector 3 is electrically connected to the fourth metal source electrode corresponding to detector 4, and is also connected to the metal lead 2, which serves as voltage output node 2. The second drain electrode corresponding to detector 2 and the fourth drain electrode corresponding to detector 4 are both connected to a power supply. The maximum linearly polarized light sensitivity angle between detector 1 and detector 2 is 45°, and the maximum linearly polarized light sensitivity angle between detector 3 and detector 4 is 45°. More preferably, if detector 1 is denoted as 0°, then the maximum linearly polarized light sensitivity angle between detector 2 is 45°, the maximum linearly polarized light sensitivity angle between detector 3 is 45°, and the maximum linearly polarized light sensitivity angle between detector 4 is 45°.

[0008] The two linear polarization detectors in each detection unit respond simultaneously to the polarization angle, wavelength, and optical power of the incident light. According to the series voltage division, the output voltage is equal to the product of the ratio of the resistance of the linear polarization detectors and the power supply voltage.

[0009] Under a given power supply voltage, when the wavelength and power of the incident light change, the resistivity of the two linearly polarized detectors connected in series, made of the same material and of identical specifications, changes proportionally, ensuring that the resistance ratio remains constant. However, when the polarization angle of the incident light changes, the difference in the maximum polarization sensitivity directions of the two detectors results in different angles of the incident light relative to these directions. Furthermore, since the resistivity of a two-dimensional material exhibits a sine / cosine relationship with the relative angle, the resistance ratio changes, consequently altering the output voltage obtained through this resistance ratio. Therefore, the output voltage obtained is only related to the polarization angle.

[0010] A second aspect of the present invention provides a scheme for accurate identification of linear polarization angles:

[0011] This solution uses a difference method to reduce common-mode interference. First, the two sets of output voltages are amplified, and then the two sets of output voltages are subtracted to form a difference, thereby reducing the common-mode noise introduced by the amplifier itself.

[0012] A third aspect of the present invention provides a calculation and processing scheme for polarization signals:

[0013] Since the resistivity of anisotropic two-dimensional materials is related to the direction of current transmission, in order to reduce errors and improve detection accuracy, it is necessary to measure the resistivity of the four detectors in the dark state and the resistivity of the four detectors when the incident light polarization angle is 0 degrees before calculation and processing. This is used as pre-input data to improve detection accuracy. Secondly, a high-precision ADC (analog-to-digital converter) is used to sample the output difference voltage of the voltage processing module over a period of time. The average value filtering algorithm is used to process the collected voltage difference to obtain an accurate digital signal. This digital signal reflects the current voltage difference. Based on the pre-input data, the polarization angle of the incident light is calculated according to the functional relationship between resistivity and relative angle to achieve the purpose of accurately distinguishing the polarization angle.

[0014] Compared with existing technologies, the detection unit scheme based on two-dimensional materials, the precise linear polarization angle identification scheme, and the polarization signal calculation and processing method provided by this invention have at least the following beneficial effects:

[0015] (1) By combining the characteristics of two-dimensional material polarization detectors and through circuit design, the output voltage is made to be only related to the angle of linear polarization light within the working wavelength range of the polarization detector, and is independent of the wavelength and power of the incident light. This greatly reduces the detection conditions based on two-dimensional material linear polarization detectors and facilitates the realization of two-dimensional material linear polarization detectors.

[0016] (2) Combining the two sets of polarization detection units and reflecting the polarization angle information through the difference change can effectively suppress common-mode interference and improve the recognition accuracy.

[0017] (3) Unlike other signal transmission methods, voltage transmission can improve anti-interference ability compared to current transmission mode.

[0018] (4) The results are displayed directly through a visualization interface after computation, which greatly improves portability compared to existing research methods. Attached Figure Description

[0019] The embodiments of the invention are described with reference to the accompanying drawings, which form a part of this disclosure. The above and other objects, features, and advantages of the invention will become clearer from these drawings. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This diagram illustrates the overall structure of the device according to Embodiment 1 of the present invention.

[0021] Figure 2 The diagram illustrates the structure of the detection unit module in Embodiment 2 of the present invention.

[0022] Figure 3 The flowchart illustrates the preparation method of the detection unit module of Embodiment 3 of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. The disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0024] Obviously, the following embodiments are all embodiments of a part of the present invention, intended to further illustrate the solutions and technologies of the present invention, and are not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive step are within the scope of protection of the present invention.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary implementations of the methods according to this disclosure. As used herein, when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0026] All terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art, unless the context otherwise requires. Embodiments will now be described in detail with reference to the accompanying drawings.

[0027] Figure 1 A schematic diagram of the overall device of Embodiment 1 of the present invention is shown.

[0028] like Figure 1 This is a schematic diagram of the overall device, which includes: a detection unit module, a voltage processing module, and a calculation and output module. The detection unit module is responsible for acquiring voltage signals that are only related to the polarization angle. The voltage processing module amplifies the signal and reduces noise through amplification and difference processing. The calculation and output module can calculate the polarization angle information from the voltage signal and output the information intuitively.

[0029] The specific module descriptions are as follows:

[0030] The detection unit module is based on the characteristic that the response of anisotropic two-dimensional materials to linearly polarized light is related to the relative angle between the linear polarization angle of the incident light and the specific crystal orientation of the two-dimensional material. In this embodiment, the angle θ of the β-GeSe2 detector is defined as the angle between the polarization direction of the incident light and the b-axis direction of the β-GeSe2 crystal. The relationship between the response photocurrent and the angle is as follows:

[0031] I(θ)=I 0° cos 2 (θ)+I 90° sin 2 (θ)

[0032] I 0° I is the photocurrent when the included angle is 0 degrees. 90° The photocurrent detection unit module for an angle of 90 degrees includes a first detection unit consisting of detectors 1 and 2 connected in series, and a second detection unit consisting of detectors 3 and 4 connected in series. These two groups respectively obtain voltage values ​​V1 and V2, which can be expressed as follows:

[0033] and R 11 To detect the resistivity of detector 1 after incident light, R 21To detect the resistivity of detector 2 after incident light, R 31 To detect the resistivity of detector 3 after incident light, R 41 To detect the resistivity of detector 4 after incident light, V dd The voltage values ​​obtained from the power supply voltage are only related to the ratio of the resistivity of the detectors. Since the four detectors differ only in the direction of maximum sensitivity in their construction, while other properties remain consistent, the proportional changes in wavelength and power do not affect the magnitude of the ratio. Thus, the obtained voltages V1 and V2 are only related to the included angle.

[0034] The voltage processing module includes two programmable gain amplifiers and a difference processing circuit. The two programmable gain amplifiers amplify V1 and V2 by the same gain factor G to achieve different power supply voltages V... dd The measurement is performed below. The difference processing circuit uses an amplifier-based subtraction circuit to subtract the two voltage values, thereby suppressing common-mode interference, and outputs the voltage difference ΔV, specifically ΔV = G × (V1 - V2).

[0035] The calculation and output module can convert voltage signals into polarization angle information and output the information intuitively. First, before calculation and processing, the resistivity of the four detectors in the dark state and the resistivity of the four detectors when the incident light polarization angle is 0 degrees are measured and denoted as R. 10 R 20 R 30 R 40 And R1, R2, R3, R4.

[0036] The specific process is as follows: ΔV is sampled within 2 seconds using a 24-bit high-precision ADC; an average value filtering algorithm is used (removing the two maximum and two minimum values ​​from the 20 sampled data points, then dividing by 16 to obtain the average voltage value over 2 seconds) to obtain the voltage value V; and the relationship between the voltage value and the angle is then used...

[0037] The specific relationship is as follows:

[0038]

[0039] in:

[0040]

[0041] The linear polarization angle of the incident light can be calculated. The calculated linear polarization angle information is then transmitted to a display device (TFT display screen) via SPI communication to visualize the linear polarization information.

[0042] Through the above embodiments, the voltage-mode signal transmission method adopted by the present invention has better anti-interference ability than the current-mode method in nanoampere-level current transmission. It also reduces common-mode signal interference by subtracting two signals. Furthermore, through the integrated operation with the calculation and output modules, it achieves high-precision measurement, in which the identifiable angles are (0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°), and can intuitively output polarization information (including dichroism ratio, linear polarization angle, and polar coordinates).

[0043] Figure 2 The flowchart illustrating the fabrication process of the detection unit module in Embodiment 2 of the present invention is shown.

[0044] like Figure 2 As shown, the detection unit module according to this embodiment 2 includes a first group of detection units and a second group of detection units. These include detector 1, where the maximum polarization sensitive direction forms a 0° angle with the reference direction; detector 2, where the maximum polarization sensitive direction forms a 45° angle with the reference direction; detector 3, where the maximum polarization sensitive direction forms a 45° angle with the reference direction; and detector 4, where the maximum polarization sensitive direction forms a 90° angle with the reference direction.

[0045] The detector 1 includes a silicon / silicon dioxide substrate, and from left to right, it comprises a first metal source electrode, a two-dimensional active material layer with a maximum polarization light sensitivity direction of 0°, and a first metal drain electrode.

[0046] The detector 2 includes a silicon / silicon dioxide substrate, and from left to right, a second metal source electrode, a two-dimensional material active layer with a maximum polarization light sensitivity direction of 45°, and a second metal drain electrode.

[0047] The detector 3 includes a silicon / silicon dioxide substrate, and from left to right, a third metal source electrode, a two-dimensional material active layer with a maximum polarization light sensitivity direction of 45°, and a third metal drain electrode.

[0048] The detector 4 includes a silicon / silicon dioxide substrate, and from left to right, it comprises a fourth metal source electrode, a two-dimensional material active layer with a maximum polarization light sensitivity direction of 90°, and a fourth metal drain electrode.

[0049] In Embodiment 2 of the present invention, the two-dimensional active layer is a two-dimensional β-GeSe2 semiconductor material; the maximum polarization sensitive direction is the b-axis direction of the β-GeSe2 crystal; and the reference direction is the b-axis direction of the β-GeSe2 crystal.

[0050] In Embodiment 2 of the present invention, the first metal source electrode is Ti / Au, wherein the thickness of Ti is 10nm and the thickness of Au is 70nm.

[0051] In Embodiment 2 of the present invention, all detector channels have a length of 10 μm and a photosensitive area of ​​10 μm × 10 μm.

[0052] In Embodiment 2 of the present invention, detector 1 and detector 2 are connected in series, and detector 3 and detector 4 are connected in series. The output voltage nodes are detector 1 and detector 2 connected to metal electrodes, and detector 3 and detector 4 connected to metal electrodes.

[0053] Through Embodiment 2 of the present invention, the detection unit module provided by the present invention, based on the characteristics of two-dimensional semiconductor materials and with the use of reasonable circuit structure design, can get rid of the dependence of the output signal on wavelength and power, avoid the stringent measurement conditions in traditional polarization detection research based on two-dimensional semiconductor materials, and facilitate the commercialization of traditional polarization detection research based on two-dimensional semiconductor materials.

[0054] It is necessary to explain that the detection scheme adopted in the detection module of this invention is based on the characteristics of two-dimensional semiconductor materials and utilizes a reasonable circuit structure design to obtain a signal that depends only on the change of polarization angle. This scheme is based on circuit design and is not only for a certain material, but is a design scheme that can be used for various materials.

[0055] Figure 3 The flowchart illustrates the preparation method of the detection unit module of Embodiment 3 of the present invention.

[0056] like Figure 3 As shown, according to this embodiment, a flowchart of a method for preparing a detection unit module is included, and the specific preparation method includes steps S310-S330:

[0057] Step S310: On a silicon / silicon dioxide substrate, four detectors, namely detector 1, detector 2, detector 3, and detector 4, with maximum sensitive directional angles of 0°, 45°, 45°, and 90°, are transferred onto the same substrate by a wet transfer method.

[0058] The specific production steps are as follows:

[0059] Using PDMS (polydimethylsiloxane) as a medium, a layer of 10% PMMA (acrylic resin) was spin-coated onto CVD-grown β-GeSe2 with complete morphology. The silica substrate was then etched with hydrofluoric acid and transferred at a certain angle to the silicon / silica substrate required for the preparation of the detection unit using a transfer platform.

[0060] The same method was used to transfer four β-GeSe2 atoms with maximum sensitive direction angles of 0°, 45°, 45°, and 90° respectively.

[0061] Step S320: Metal electrodes are fabricated using a multi-photolithography method, wherein the first photolithography is used to fabricate the first metal source electrode and the first metal drain electrode of detector 1, the second photolithography is used to fabricate the second metal source electrode and the second metal drain electrode of detector 2, the third photolithography is used to fabricate the third metal source electrode and the third metal drain electrode of detector 3, and the fourth photolithography is used to fabricate the fourth metal source electrode and the fourth metal drain electrode of detector 4.

[0062] The specific steps for manufacturing the metal electrode are as follows:

[0063] Using the layout of the source and drain electrodes, photoresist is first coated onto a silicon / silicon dioxide substrate, and then the photoresist is homogenized using a spin coater. A hot plate is then used to bake the photoresist to evaporate the photoresist solvent and enhance the adhesion between the photoresist and the substrate. The source and drain electrode patterns are transferred onto the photoresist using a photolithography alignment detector 1, and then developed using a developer to display the electrode patterns. Ti / Au electrodes are then deposited by electron beam evaporation, with Ti having a thickness of 10 nm and Au having a thickness of 70 nm. Finally, unwanted photoresist is removed using an acetone solution, and the remaining metal electrodes are stripped off, ultimately forming the first source electrode and the first drain electrode.

[0064] Using the same method, the second source electrode and the second drain electrode of detector 2, the third source electrode and the second drain electrode of detector 3, and the third source electrode and the third drain electrode of detector 3 are prepared.

[0065] In step S330, output node 1 and output node 2 are finally led out through leads to serve as the output voltage of the polarization detection module.

[0066] The specific implementation steps are as follows:

[0067] A multi-functional pressure welding machine is used to connect the first metal drain electrode to the second metal source electrode, and the third metal drain electrode to the fourth metal source electrode, which are then led out as output voltage nodes.

[0068] In summary, the present invention can prepare a detection unit module.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0070] The above description is merely an embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision linear polarization information measurement device that outputs information only related to the polarization angle, characterized in that, It includes two sets of detection units. Each set of detection units consists of linear polarization detectors connected in series with a 45° difference in the maximum linear polarization light sensitivity angle to obtain two voltage values ​​that are only related to the angle of linear polarization light. The output voltage of each set of detection units is connected to a voltage amplification and processing module to filter common-mode noise interference. That is, the output voltage of each set of detection units is connected to a voltage amplifier. The two amplified voltages are connected to a difference processor for difference processing. The processed voltage signal is then combined with the calculation and output module to quickly obtain the polarization information of the detected incident light. One set of detection units consists of detector 1 and detector 2 connected by a metal lead 1, and another set of detection units consists of detector 3 and detector 4 connected by a metal lead 2. The first metal source electrode corresponding to detector 1 and the first metal source electrode corresponding to detector 3 are both connected to ground. The first metal drain electrode corresponding to detector 1 and the second metal source electrode corresponding to detector 2 are connected through the metal lead 1, which serves as voltage output node 1. The third metal drain electrode corresponding to detector 3 and the fourth metal source electrode corresponding to detector 4 are connected through the metal lead 2, which serves as voltage output node 2. The second drain electrode corresponding to detector 2 and the fourth drain electrode corresponding to detector 4 are both connected to the power supply. The maximum linear polarization sensitivity angle between detector 1 and detector 2 is 45°, and the maximum linear polarization sensitivity angle between detector 3 and detector 4 is 45°.

2. A high-precision linear polarization information measurement device according to claim 1, which outputs information only related to the polarization angle, characterized in that, In operation, the detection unit module first receives the incident light simultaneously through two sets of detection units. Within each set, linear polarization detectors with a 45° difference in the maximum linear polarization light sensitivity angle are connected in series, with the current transmission direction consistent with the reference direction.

3. A high-precision linear polarization information measurement device according to claim 1, which outputs information only related to the polarization angle, characterized in that... If detector 1 is recorded as 0 degrees, then the maximum linearly polarized light sensitivity angle between detectors 2 is 45°, the maximum linearly polarized light sensitivity angle between detectors 3 and 4 is 45°.

4. A high-precision linear polarization information measurement device according to any one of claims 1-3, characterized in that, The two linear polarization detectors in each detection unit respond simultaneously to the polarization angle, wavelength, and optical power of the incident light. According to the series voltage division, the output voltage is equal to the product of the ratio of the resistance of the linear polarization detectors and the power supply voltage.

5. A high-precision linear polarization information measurement device according to any one of claims 1-3, characterized in that, Under a given power supply voltage, when the wavelength and power of the incident light change, the resistivity of the two linear polarization detectors connected in series, made of the same material and of the same specifications, will change proportionally, ensuring that the resistance ratio remains constant. When the polarization angle of the incident light changes, the polarization angle of the incident light relative to the maximum polarization sensitive directions of the two polarization detectors will be different due to the difference in their maximum polarization sensitive directions. Furthermore, since the resistivity of the two-dimensional material exhibits a sine and cosine function relationship with the relative angle, the resistance ratio will change, and consequently, the output voltage obtained through the resistance ratio will change. Therefore, the output voltage obtained is only related to the polarization angle.

6. A high-precision linear polarization information measurement device according to any one of claims 1-3, characterized in that, By using the method of obtaining the difference to reduce common-mode interference, the two sets of output voltages are first amplified, and then the two sets of output voltages are subtracted to form the difference, thereby reducing the common-mode noise caused by the amplifier itself.

7. A high-precision linear polarization information measurement device according to any one of claims 1-3, characterized in that, Since the resistivity of anisotropic two-dimensional materials is related to the direction of current transmission, in order to reduce errors and improve detection accuracy, it is necessary to measure the resistivity of the four detectors in the dark state and the resistivity of the four detectors when the incident light polarization angle is 0 degrees before calculation and processing. This is used as pre-input data to improve detection accuracy. Secondly, a high-precision ADC is used to sample the output difference voltage of the voltage processing module over a period of time. The average value filtering algorithm is used to process the collected voltage difference to obtain an accurate digital signal. This digital signal reflects the current voltage difference. Based on the pre-input data, the polarization angle of the incident light is calculated according to the functional relationship between resistivity and relative angle to achieve the purpose of accurately distinguishing the polarization angle.

8. A high-precision linear polarization information measurement device according to any one of claims 1-3, characterized in that, The angle θ of the β-GeSe2 detector is defined as the angle between the polarization direction of the incident light and the b-axis direction of the β-GeSe2 crystal, where the relationship between the response photocurrent and the angle is: ， ； The detection unit module includes a first detection unit consisting of detectors 1 and 2 connected in series, and a second detection unit consisting of detectors 3 and 4 connected in series. These two groups respectively obtain two sets of voltage values, V1 and V2, denoted as follows: The obtained voltage values ​​are only related to the ratio of the resistivity of the detectors. Since the four detectors differ only in the direction of maximum sensitivity in their construction, while other properties remain consistent, the proportional changes in wavelength and power do not affect the magnitude of the ratio. Thus, the obtained voltages V1 and V2 are only related to the included angle.

9. A high-precision linear polarization information measurement device according to claim 8, which outputs information only related to the polarization angle, characterized in that, The voltage amplification processing module includes two programmable gain amplifiers and a difference processing circuit; the two programmable gain amplifiers amplify V1 and V2 by the same amplification factor G to achieve different power supply voltages V dd The measurement is performed below; the difference processing circuit uses an amplifier-based subtraction circuit to subtract the two voltage values, thereby suppressing common-mode interference and calculating the voltage difference. To output, specifically ; The calculation and output module can calculate the voltage signal into polarization angle information and output the information intuitively. First, before processing, the resistivity of the four detectors in the dark state and the resistivity of the four detectors when the incident light polarization angle is 0 degrees are measured and recorded as follows: The specific process involves using a 24-bit high-precision ADC to perform [analysis] within 2 seconds. Sampling is performed, and an average value filtering algorithm is used to obtain the voltage value V. The relationship between the voltage value and the angle is then utilized. The specific relationship is as follows: ， in , ， The linear polarization angle of the incident light can be calculated; the calculated linear polarization angle information of the incident light is transmitted to the display device via SPI communication to visualize the linear polarization information.

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