641 results about "Photocurrent" patented technology

The invention relates to the technical field of biomedical sensing and health monitoring, and discloses a noninvasive glucose detection system. The system comprises an interstitial fluid extraction device, a photoelectric sensing module and a main control circuit which are integrated on a flexible substrate. The interstitial fluid extraction device drives subcutaneous interstitial fluid to migrate to the hydrogel interface layer under the action of reverse ion electroosmosis; the photoelectric sensing module receives interstitial fluid through a hydrogel interface layer, a working electrode of the photoelectric sensing module comprises a Cu monatomic imprinting recognition layer, and imprinting holes formed by Cu monatomic sites are specifically coordinated with glucose molecules. The master control circuit controls sampling and determines the glucose concentration based on the photocurrent signal. Noninvasive sampling and monatomic imprinting photoelectric detection are fused, sampling-detection integration is achieved, and the device has the advantages of being noninvasive, painless, high in selectivity, high in interference resistance, comfortable to wear and the like and is suitable for continuous monitoring of blood glucose.

The invention discloses a motion recognition method and system based on a redox photoelectric memristor, a terminal and a storage medium, and the method comprises the steps: selecting classical motions based on a human body motion data set, extracting time sequence data, and coding the time sequence data into an optical pulse sequence; constructing a reservoir array composed of a plurality of photoelectric memristors, and expanding an optical pulse sequence signal into a high-dimensional state vector; constructing a supervised training model, solving a weight matrix, and constructing a memristive cross array; and outputting an action classification result through simulation domain operation based on the output current multi-path light current signals in combination with the memristor cross array. According to the method, the motion features can be directly fed into a rear-end classification network for action recognition without depending on a complex digital feature extraction algorithm, so that the transmission and processing overhead of redundant data is fundamentally eliminated; a high-efficiency, low-delay and high-robustness hardware solution is provided for real-time and anti-noise motion recognition in scenes such as intelligent monitoring and man-machine interaction.

The invention relates to the technical field of biomedicine, discloses mutant photo-induced ion channel ChR-2 protein, and further discloses a nucleic acid construct, an expression vector, a cell, related application and a computer model. The light-sensitive channel ChR2 protein mutant obtained by the invention has stronger light current, and the light-sensitive capability of the light-sensitive channel ChR2 protein mutant is at least improved by 100 times; besides, the invention also obtains a nucleotide sequence for coding the light-sensitive channel ChR2 protein mutant, constructs a recombinant expression vector, and obtains the light-sensitive channel ChR2 protein with higher expression quantity and stronger light sensitivity, and the light-sensitive channel ChR2 protein is very suitable for expression in cells of mammals (especially human); according to the invention, the rhodopsin in different channels is systematically studied by modifying the position G224 in the helix 6 of seven transmembrane helix motifs, which proves that the mutation of the position G224 in the helix 6 in WT ChR2 accelerates the photosensitivity of the channels, and the considered position is homologous in the helix 6 of the rhodopsin in different channels.

The invention relates to the technical field of quantum sensing, and discloses a quantum magnetometer device based on diamond NV color center photoelectric detection magnetic resonance. Wherein the optical path module performs optical excitation and imaging positioning on a diamond sample through a laser and an objective lens. The circuit module integrates a microwave source, a lock-in amplifier, a low-noise current amplifier and a programmable power supply, applies a microwave field and bias voltage to a microwave antenna and an interdigital electrode on the surface of a sample respectively, and collects sample dependency photocurrent signals. And the operation module realizes automatic control and data processing of the system. According to the device, NV color center spin state information is converted into a photocurrent signal through a photoelectric detection magnetic resonance mechanism, an amplitude or frequency modulated signal is demodulated by using a lock-in amplification technology, information of a detection magnetic field is obtained through a high signal-to-noise ratio photoelectric detection magnetic resonance spectrum, and the sensitivity of the magnetic field is evaluated. Magnetic resonance signals are detected in an all-electricity mode, a complex optical system of traditional fluorescence detection is simplified, and the device has the advantages of being compact in structure, easy to integrate, high in measurement sensitivity and the like.

The invention discloses a magnetic sensor, a sensing measurement system and a magnetic field measurement method, and relates to the technical field of magnetic field measurement, the magnetic sensor comprises an excitation light source, a light path collection assembly, a fluorescence detector and a shielding shell, and the excitation light source, the light path collection assembly and the fluorescence detector are fixedly arranged in the shielding shell in sequence; the light path collection assembly comprises an NV color center diamond, a magnetic field bias module and a fluorescence convergence assembly, the magnetic field bias module can provide a bias magnetic field for the NV color center diamond, the NV color center diamond can emit fluorescence under the action of the exciting light and the bias magnetic field, and the fluorescence convergence assembly can converge the fluorescence emitted by the NV color center diamond to collect the fluorescence emitted by the NV color center diamond. The fluorescence detector can receive the fluorescence converged by the fluorescence convergence assembly, and can transmit a light current signal obtained by detecting the fluorescence to the signal acquisition system; according to the invention, volume miniaturization can be realized conveniently, scene adaptability, anti-interference capability, precision stability and reliability are improved, and use cost is reduced.

The invention relates to the technical field of AMOLED display driving, and discloses an AMOLED display driving chip integrated system with high refresh rate and low power consumption. The system comprises a pixel flow time sequence analysis module, a dynamic compensation model construction module, a refresh rate adaptive modulation module and a power consumption constraint optimization module. A pixel stream time sequence analysis module captures video source frame cache data in real time, and extracts a pixel brightness distribution matrix and an inter-frame change gradient; a dynamic compensation model building module builds a dynamic voltage compensation network according to the current frame and historical frame information, and fuses the current frame and historical frame information through a space-time attention mechanism; the refresh rate adaptive modulation module generates a decision diagram according to the inter-frame change gradient, and regulates the refresh rate in different regions; and the power consumption constraint optimization module is combined with a chip junction temperature parameter to generate a partition backlight current constraint coefficient matrix. The system can optimize display image quality and fluency, realizes power consumption fine control, guarantees stable operation of a chip, and is suitable for various AMOLED display terminals.

The invention discloses a logarithmic pixel signal quantization method and module based on gain dynamic adjustment, and an image sensor. The logarithmic pixel signal quantization method comprises the following steps of: converting light current into logarithmic voltage by logarithmic amplification by using a logarithmic response unit; the voltage type comparator compares the logarithmic voltage with a threshold voltage, outputs a gain regulation and control signal for gain configuration of the programmable gain amplifier and input reference voltage switching, enables the programmable gain amplifier to work in different gain modes, and inputs a flag bit to the N-bit analog-to-digital converter; based on the current gain mode, the programmable gain amplifier amplifies the logarithmic voltage and translates the logarithmic voltage into the quantization range of the N-bit analog-to-digital converter to be output; the N-bit analog-to-digital converter samples an output voltage signal of the programmable gain amplifier, combines the output voltage signal with a flag bit, and outputs an N + 1-bit equivalent digital code value signal. According to the invention, high-sensitivity quantization of low-light-intensity signals and high-precision conversion of high-light-intensity signals are realized at the same time.

An electro-optical integrated circuit comprising an optical transmitter and an optical receiver is disclosed in which a monolithically integrated electro-absorption modulated laser (EML) can operate bi-directionally in both transmitter and receiver modes. Vertically stacked waveguides for lasers and electro-absorption modulators (EAMs) are provided. The laser and the EAM are optically coupled through a transverse conical vertical optical coupler. The EML includes monolithically integrated electronic circuitry, such as drivers and control electronics for driving the laser as the EML and the EAM in the transmitter mode. The control circuit includes a transimpedance amplifier (TIA). The EAM has a first portion and a second portion that may be independently biased. In receiver mode, the laser current is reduced near a threshold, a first portion of the EAM is biased to absorb residual laser light, while a second portion of the EAM provides photocurrent to the TIA as a photodiode receiver.

The invention provides a spectrograph, a spectrum reconstruction method and device and electronic equipment, and relates to the field of spectrum analysis. The spectrograph comprises a chip and a peripheral circuit, the chip comprises a photoelectric response layer, a gate layer and an electrode lead-out layer, and a target semiconductor is arranged in the photoelectric response layer; the photoelectric response layer is used for converting an incident spectrum into a photocurrent signal; the gate layer is used for changing the photoelectric response characteristic of the target semiconductor and covers the upper and lower surfaces of the photoelectric response layer; the electrode lead-out layer is used for outputting the photocurrent signal to external equipment, and the external equipment is used for reconstructing an incident spectrum according to the photocurrent signal and the photoelectric response characteristic of the target semiconductor; the peripheral circuit is used for maintaining the chip to work. According to the invention, the semiconductor with adjustable photoelectric response characteristics is used as the core of the photoelectric response layer, so that the spectrometer has the spectral analysis capability from infrared to terahertz wave bands, does not need to depend on a huge optical assembly and a precise mechanical displacement assembly, and can effectively solve the problems in the prior art.

The invention discloses a seawater chemical oxygen demand determination method based on bias voltage photoelectric oxidation, and relates to the technical field of water quality monitoring. The method comprises the following steps: collecting seawater and performing pretreatment to obtain a seawater sample; adding supporting electrolyte into the seawater sample to obtain an electrolytic water sample; the method comprises the following steps: injecting an electrolysis water sample into a photoelectrochemical reaction tank, applying bias voltage to a working electrode by taking Ag / AgCl as a reference electrode, and turning on a light source with a specific wavelength for irradiation; carrying out an oxidation reaction in the photoelectrochemical reaction tank, and after the oxidation reaction of the organic matter is complete, obtaining a steady-state photocurrent with a stable current signal; according to a preset steady-state light current-COD concentration curve, a COD measured value is obtained, the COD standard concentration value is corrected according to the water temperature and the salinity, and a COD corrected value is obtained. An adjustable tiny external bias voltage is introduced to cooperate with light source irradiation, so that rapid, accurate and high-anti-interference measurement of COD in seawater is realized.

The invention relates to the technical field of semiconductor photoelectric device test and diagnosis, in particular to an infrared focal plane process diagnosis method based on machine learning, which comprises the following steps of: firstly, collecting photocurrent spectrum data of a plurality of pixel units on a focal plane array, and extracting a spectrum feature vector after preprocessing; secondly, a machine learning model is trained to obtain a performance prediction model, and key spectral features are obtained through feature importance evaluation; and finally, in combination with semiconductor physical simulation, establishing quantitative correlation between the key spectral characteristics and manufacturing process parameters, and completing diagnosis of production process links. The invention also comprises an optimization method. According to the method, spectral deep form information neglected by a conventional method is deeply mined and quantified, high-precision prediction of the response rate of each pixel of the whole focal plane array is realized by constructing characteristics closely related to a device microscopic physical mechanism, and correlation between spectral characteristics and process structure parameters is established, so that the accuracy of the device is improved. And the performance optimization and the process rapid iteration of the infrared detector chip are guided.

Provided are a vision sensor and an image processing device including the vision sensor. The vision sensor includes a pixel array including a plurality of pixels each including a photoelectric conversion device, which is configured to generate an optical current, a read-out circuit configured to generate intensity image data based on a magnitude of a voltage converted from the optical current, and a data output logic configured to generate event data based on a variation amount in the voltage converted from the optical current.

The invention relates to the technical field of visual sensing modules, and discloses a sensing-storage-calculation integrated bionic visual sensing module in-storage calculation method and system.The method comprises the steps that photo-induced electrons excited by incident photons are directly injected into memristor oxygen vacancy conductive filaments through a shared electrode interface, and photocurrent driving signals are obtained; in a forward SET mode, driving memristor oxygen vacancy conductive filaments to form cross array conductivity distribution, and calculating row line driving voltage of a memristor cross array; applying the current to each cross point of cross array conductance distribution in a reverse RESET mode to obtain a flowing current of each cross point; and converging and summing the flowing current of each cross point at a column line node to obtain a column line output current, performing capacitor charging integration on the column line output current, and converting the column line output current into an analog domain convolution operation voltage, thereby avoiding intermediate multiple analog-to-digital and digital-to-analog conversion loss. And end-to-end low-delay and low-power-consumption processing from photon sensing to feature calculation is realized.

The utility model discloses a pixel unit circuit, a readout circuit and an infrared imaging sensor, and the pixel unit circuit comprises a front-end reading module which is used for converting a light current inputted by an infrared detector array into a light voltage and improving the output swing of the light voltage; the amplification and comparison module is connected with the front-end reading module, and is used for sampling the photovoltage, amplifying a change value of the photovoltage to obtain an amplified photovoltage and comparing the amplified photovoltage with a threshold voltage; and the signal resetting module is connected with the amplification and comparison module and is used for outputting a resetting signal to the amplification and comparison module to trigger the amplification and comparison module to sample the light voltage and outputting an event signal according to a comparison result of the amplified light voltage and the threshold voltage. According to the utility model, the front-end reading module is used for increasing the swing of the output photovoltage, so that the sensitivity of the photovoltage signal to noise and interference in the transmission process is reduced, the anti-interference capability of the signal is enhanced, and the signal-to-noise ratio is improved.

The invention discloses a polarization-dependent bipolar infrared detector based on a corner heterojunction, a preparation method and a photocurrent response polarity regulation and control method. The polarization-dependent bipolar infrared detector comprises a substrate, a corner Van der Waals heterojunction and a transferable metal electrode, wherein the corner Van der Waals heterojunction and the transferable metal electrode are sequentially stacked on the substrate from bottom to top; the corner Van der Waals heterojunction is obtained by sequentially stacking p-type semiconductors, n-type semiconductors and p-type semiconductors to form an npn junction and forming a corner by changing the crystal orientation included angle of the two p-type semiconductors; a built-in electric field is used for driving photon-generated carrier separation, so that the infrared detector works in a photovoltaic mode.

An integrated configurable photodetector with an ultra-high circular polarization extinction ratio and a preparation method therefor are provided. The photodetector includes a metal reflective layer, a dielectric layer, an electrode layer, and a two-dimensional material layer. The electrode layer includes symmetrically arranged Z-shaped metallic optical antenna arrays which are respectively integrated with a source electrode and a drain electrode and have opposite chirality. The photodetector operates at zero bias state, and a photo-response is photovoltaic effect, hot electron injection, photo-thermoelectric effect and so on induced by a Schottky junction composed of the source electrode, the drain electrode and the two-dimensional material. By adjusting the distribution of the incident light in the source and drain electrode regions, under specific Circularly polarized light, photocurrents of equal magnitude but opposite directions cancel each other out, resulting in a net output of zero and significantly reducing noise.

The invention provides a picoampere-level current measuring device and method with leakage estimation and digital compensation, and the device comprises an electrometer-level operational amplifier and a transimpedance feedback network which are used for converting a measured current into a voltage signal; in combination with a retaining ring conductor driven by a retaining ring buffer and an inner and outer double-layer metal shielding structure, high-resistance node leakage and external interference are remarkably reduced. The digital controller injects 5mV-50mV micro excitation into the retaining ring in a non-sampling window and detects output response so as to estimate input equivalent leakage conductance and perform online compensation; and meanwhile, environment self-adaptive correction is carried out according to a temperature and humidity-leakage admittance model. The system adopts a 24-bit analog-to-digital converter, two-stage zero-drift amplification and multi-point linearity calibration can be switched, picoampere-level current measurement with high precision, low noise and wide dynamic range is realized, and the system is suitable for the fields of high-insulation detection, light current measurement, electrochemical micro-current analysis and the like.

An image sensor device includes a capacitor structure that is configured to store charge associated with a photocurrent that is generated by a pixel sensor in a pixel sensor array of the image sensor device. The capacitor structure may include bottom electrode layers and top electrode layers that are arranged in an alternating manner and separated by insulator layers. The ends of the bottom electrode layers facing a top contact structure are etched such that the ends of the bottom electrode layers are spaced apart from the top contact structure. Similarly, the ends of the top electrode layers facing a bottom contact structure are etched such that the ends of the top electrode layers are spaced apart from the bottom contact structure.

The invention provides a nitrogen-vacancy carbon nitride / indium oxide heterojunction photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysts. The nitrogen vacancy carbon nitride is used as a framework of the catalyst, and the charge distribution of the carbon nitride can be adjusted by nitrogen vacancy defects, so that the carrier migration rate and the surface active site abundance are improved; the nitrogen vacancy also changes the charge recombination mode of the carbon nitride, the energy band structure of the carbon nitride is beneficially adjusted, the photovoltaic performance of the carbon nitride is improved, the visible light response range of the carbon nitride is widened, and the photocatalytic performance of the carbon nitride is remarkably improved; indium oxide is introduced to form a heterojunction with nitrogen vacancy carbon nitride, so that electron-hole recombination can be inhibited, a new electron transmission channel is generated, and the carrier transmission rate is increased; the band gap characteristic of indium oxide is consistent with the band gap characteristic of nitrogen vacancy carbon nitride, so that the photocurrent response intensity of the catalyst can be improved, the charge transfer resistance is reduced, and the photocatalytic performance is synergistically enhanced.

The application discloses an optical time domain reflectometry (OTDR) method, system and OTDR equipment for avoiding event blind area, and relates to the technical field of OTDR. The OTDR method adds a second detector to the ground end of a first detector, and detects the optical signal emitted by a second light source by using the second detector. Then, when measuring the OTDR curve of a to-be-measured optical fiber, the second driver is controlled to drive the second light source to emit a compensation optical signal within a pre-determined saturation time interval, so that the photocurrent detected by the second detector offsets and compensates the photocurrent detected by the first detector, and the current input to the amplification circuit is lower than the saturation threshold, thereby eliminating the event blind area caused by saturation, enabling the blind area event to be detected, and without adding a selection switch, thereby avoiding introducing additional noise, improving the optical fiber OTDR test accuracy and having better noise performance.

The application discloses a photoelectric detection chip testing system and method. The system comprises a light source assembly, a power supply assembly, a fiber assembly, a conversion assembly, a coupling assembly and a testing assembly. The light source assembly is used for providing a test light signal. The power supply assembly provides a bias voltage for a to-be-tested photoelectric detection chip. The fiber assembly is used for receiving the test light signal and transmitting the test light signal to the to-be-tested photoelectric detection chip. The conversion assembly is used for receiving a photoelectric current signal output by the to-be-tested photoelectric detection chip, converting the photoelectric current signal into a voltage signal and providing the voltage signal to the coupling assembly. The coupling assembly is used for controlling the fiber assembly to move based on the voltage signal provided by the conversion assembly, so that the to-be-tested photoelectric detection chip is coupled to the most test light signals. The testing assembly is used for testing the performance of the to-be-tested photoelectric detection chip in the case that the to-be-tested photoelectric detection chip is coupled to the most test light signals.

The optical touch module comprises the following components: a light source, a first grating, a second grating, an optical waveguide layer, a photoelectric detector array and a signal processing module, a first grating and a second grating with different vector directions are arranged on the optical waveguide layer; the light source emits incident light with a specific wavelength, and the diffraction angle of diffraction light of the incident light in the first grating and the second grating in the air is larger than 90 degrees. The light source is incident on the optical waveguide layer to form a light spot, and the light spot covers the first grating and the second grating; diffracted light is coupled into the optical waveguide layer by the first grating and the second grating to form two waveguide modes in different directions, and the diffracted light is transmitted to the side edge of the optical waveguide layer to form at least four light current points which are received by the photoelectric detector array arranged on the side edge; the signal processing module calculates the position of an incidence point of the light source on the optical waveguide layer according to the position of an electric signal of the photoelectric detector array, and finally completes optical interaction with incident laser as a signal. The design that the vector directions of the first grating and the second grating point to the long side of the optical waveguide layer enables light to be propagated at a certain angle in the short side direction of the optical waveguide layer, propagation paths can be reduced, optical waveguide transmission loss can be reduced, the electric signal strength is improved, and therefore the touch size is increased under the conditions of the same laser signal strength and the same detector.

The application belongs to the technical field of environmental catalysis and green chemical industry, and particularly relates to a PDI / PMSO composite photocatalytic system and a method for producing hydrogen peroxide by using organic wastewater. The PDI / PMSO composite photocatalytic system can significantly improve the yield of H2O2, and when the concentration of PMSO is 10 mM, the yield of H2O2 reaches 137.28 muM.g ‑1 ·h ‑1 -1.h-1, which is 4.3 times higher than that of a pure water system. The system can promote the separation of photo-generated electron-hole pairs (the steady-state fluorescence intensity is reduced by 37%) and enhance the electron conduction efficiency (the photocurrent is increased by 1.8 times) through synergistic effect, and has excellent cycle stability (the yield is maintained above 80% after 10 cycles) and practical water body applicability. The process is simple and low in cost, and provides an integrated solution for the resource utilization of organic wastewater and the green synthesis and application of H2O2.

A gate apparatus configured to perform an XOR operation on received input signals to provide a logical output signal, y. The apparatus includes at least one first signal input adapted to receive a first input signal; and at least one second signal input adapted to receive a second input signal. At least one of the received input signals is split into a first split signal portion fed to a photo diode to generate an electrical photocurrent supplied to a junction node, and a second split signal portion combined with at least a signal portion of the other signal received at the second signal input to generate a combined optical output signal supplied to an electro-optical modulator to provide the logical output signal, y. The electro-optical modulator is driven by a photocurrent processing unit having an input connected to the junction node.

The invention relates to the technical field of photoelectric detection, in particular to a photocurrent imaging system based on a probe station and an electrometer. The system generates a focused detection light beam through a light path system, the focused detection light beam irradiates a sample carried by a probe station after being spatially modulated by a mask plate, weak light current signals generated by the sample are collected by an electrometer, and a high-resolution light current distribution image is generated by combining scanning motion of a high-precision electric control displacement platform and intelligent processing of computer software. A physically-driven signal enhancement model, a multi-dimensional noise suppression algorithm and a dynamic imaging optimization formula are innovatively designed, the problems that in the prior art, weak light current detection precision is low, the scale connection error is large, and imaging efficiency is insufficient are solved, accurate quantitative analysis of the photoelectric characteristics of materials is achieved, and the method is suitable for popularization and application. The method is suitable for semiconductor device research and development, solar cell performance evaluation, biosensor detection and other scenes, and has both detection precision and application flexibility.

The invention provides a bionic visual array system based on a two-dimensional negative capacitance phototransistor, and relates to the technical field of photoelectric detection, and the bionic visual array system comprises a MoS2 negative capacitance phototransistor, a voltage conversion circuit, a differential amplification circuit, a sampling hold circuit, a switching circuit and a voltage regulation circuit. The MoS2 negative capacitance photoelectric transistor is used for sensing a light signal to generate a light sensing current signal, the light sensing current signal is processed by the voltage conversion circuit, the differential amplification circuit and the sampling hold circuit and then a sampling hold signal is output, and the switching circuit controls the output of the sampling hold signal; the voltage adjusting circuit is used for adjusting the gate voltage of the gate of the MoS2 negative capacitance photoelectric transistor; the conduction threshold voltage of the MoS2 negative capacitance phototransistor is inversely correlated with the illumination intensity, and when the gate voltage is smaller than the dark state current turn-on voltage, the illumination sensitivity is positively correlated with the gate voltage; and the photosensitive modules sequentially output corresponding sampling holding signals according to a preset sequence. The system can realize data redundancy processing.

The utility model relates to a PD detection alarm protection circuit of a laser. The PD detection alarm protection circuit comprises a PD sensor, a resistance voltage division circuit, an in-phase proportion amplification circuit, a comparator circuit and a voltage reference circuit, the PD sensor collects a PD photocurrent signal of the laser and then sends the PD photocurrent signal to the resistance voltage division circuit; the resistance voltage division circuit converts the PD photocurrent signal into a PD voltage signal and then sends the PD voltage signal to the in-phase proportion amplification circuit; the in-phase proportional amplification circuit amplifies the PD voltage signal and then transmits the PD voltage signal to one input end of the comparator circuit, the other input end of the comparator circuit is connected with the voltage reference circuit, and the output end of the comparator circuit outputs a processed PD signal; by optimizing a pre-stage amplification framework and a post-stage reference design, the detection reliability is remarkably improved while the cost is reduced, and the detection response speed is very high. And real-time monitoring can be realized through an upper computer. The system is especially suitable for a safety protection system of industrial laser equipment.

The invention discloses an infrared bipolar linearly-polarized photoelectric detector and a preparation method thereof, and the infrared bipolar linearly-polarized photoelectric detector is characterized in that a bipolar material graphene is used as a channel material, a two-dimensional N-type semiconductor material molybdenum disulfide MoS2 and an anisotropic narrow-band-gap two-dimensional material black phosphorus BP are stacked on the bipolar material graphene in sequence, and the two-dimensional N-type semiconductor material molybdenum disulfide MoS2 and the anisotropic narrow-band-gap two-dimensional material black phosphorus BP are stacked on the channel material; the polarity of the graphene is regulated and controlled by the bottom gate, the infrared bipolar linearly polarized photoelectric detector with the bipolar linear polarization detection effect that the light current symbol reversibly turns over along with the polarization direction in the infrared band is achieved, and the infrared bipolar linearly polarized photoelectric detector has the advantages of being simple in structure, easy to regulate and control, capable of remarkably improving polarization recognition precision and the signal-to-noise ratio and the like. The programmable and multifunctional integration potential is also realized.

The invention belongs to the technical field of ultraviolet photoelectric detectors, and discloses a vertical diamond ultraviolet photoelectric detector simulation analysis method and related equipment, and the method comprises the steps: building a geometric model, setting material parameters, coupling a semiconductor field and an electrostatic field, and carrying out the simulation calculation. The problems of high cost, time consumption, difficulty in quantification of key parameter influence, difficulty in observation of photon-generated carrier transport operation and the like caused by dependence on actual device preparation in the prior art can be effectively solved; according to the method, simulation result data such as electron concentration distribution, hole concentration distribution, potential distribution and the like can be obtained by simulating the process that ultraviolet light penetrates through a transparent electrode and irradiates a diamond layer and collecting photo-generated carriers to output light current, so that visual and quantitative reference information is provided for research and development personnel; structural optimization and design improvement of the detector can be effectively guided, blindness of a traditional research and development mode is avoided, and research and development efficiency and device performance are remarkably improved.

The present application relates to a kind of hAAG photoelectrochemical detection method based on sulfur vacancy engineering, belong to analytical detection technical field.The present application will prepare hairpin structure DNA to single-stranded DNA, sequentially join different concentrations of human alkyladenine DNA glycosylase (hAAG), endonuclease IV, exonuclease I and its reaction buffer;Dopamine solution is added to reaction, and the enzymatic reaction system of hAAG is obtained;CdZnS modified electrode is immersed in enzymatic reaction product solution and reacts, so that dopamine and zinc atom on the surface of CdZnS are combined by ortho-hydroxy coordination, and sulfur vacancy is induced to generate;Photoelectrochemical test is carried out to CdZnS modified electrode, the photocurrent signal is detected, the linear relationship between photocurrent signal and hAAG concentration is established, and the quantitative detection of hAAG is realized.The present application not only provides efficient strategy for hAAG detection, but also provides new ideas for performance optimization of sulfide-based photoelectrochemical device.