711 results about "Circular polarization" patented technology

The invention specifically discloses a circular polarization selection type wavefront shaping device of a terahertz wave band and a use method, and relates to the technical field of terahertz application. The device comprises a dielectric substrate layer and a dielectric cylinder microstructure layer, wherein the dielectric cylinder microstructure layer is arranged at the top of the dielectric substrate layer; the dielectric cylinder microstructure layer is composed of supramolecular dielectric cylinders arranged in an array mode, and each supramolecular dielectric cylinder is composed of a first dielectric cylinder superatom and a second dielectric cylinder superatom which are different in size. The first dielectric cylinder superatoms and the second dielectric cylinder superatoms are of sub-wavelength structures, and the distances between the dielectric cylinder superatoms in the adjacent rows and between the dielectric cylinder superatoms in the adjacent columns are smaller than the wavelength of incident terahertz waves. The first dielectric cylinder super atoms and the second dielectric cylinder super atoms and the corresponding substrates form geometric phase units respectively, and the dielectric cylinder rotation angles of the first dielectric cylinder super atoms and the second dielectric cylinder super atoms change along with coordinates. The device realizes selection and wavefront shaping of right-handed or left-handed circularly polarized terahertz waves, and can be widely applied to the fields of terahertz polarization spectrum measurement and imaging.

The invention provides a functional composite one-dimensional metal cavity slot array antenna, which belongs to the field of antennae, and comprises a feed cavity and a cover plate located at the top of the feed cavity, a plurality of groups of periodic intermediate-frequency anti-interference metal blocks and high-frequency anti-interference metal blocks are arranged in the feed cavity, and a radiation slot is formed in the cover plate. The polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open manner to form an undulating shape; an antenna array is also provided. An anti-interference periodic structure is embedded in the feed cavity, the antenna is endowed with anti-interference capacity in multiple different frequency bands, the polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open mode to form an undulating shape, an electromagnetic signal is input into the feed cavity, linearly polarized electromagnetic waves are radiated outwards through the radiation slot, and the antenna is formed. Linear polarization electromagnetic waves are decomposed into a group of orthogonal components with the same amplitude after passing through the polarization conversion structure, a 90-degree phase difference exists between the two components, circular polarization is formed to radiate towards the space, the polarization conversion structure is simple in structure and convenient to process, and the scattering characteristic of the antenna is improved.

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.

The invention discloses a low-profile and high-integration broadband dual-circularly-polarized transceiving common-aperture phased-array antenna, which adopts a multi-layer PCB (Printed Circuit Board) laminated structure, comprises a radiation patch layer, a quasi-rectangular patch layer, a metal reflection ground layer and a feed layer from top to bottom, and is combined with a metalized blind hole and a buried hole to form a complete coupling path. A U-shaped groove, a U-shaped metal strip and a C-shaped groove are integrated on a metal reflection ground, and a staggered groove is loaded on a quasi-rectangular patch, so that a K / Ka dual-band separated dual-coupled feed structure is realized, and dual circularly polarized radiation is obtained under the same aperture. The antenna is further provided with outer ring and inner ring plated-through hole arrays, the outer ring plated-through hole arrays are used for constructing an isolation area to improve the isolation degree between wavebands, and the inner ring plated-through hole arrays introduce a horizontal electric field component to improve the circular polarization purity and expand the axial ratio bandwidth. Wide impedance bandwidth and wide axial ratio bandwidth are realized in the K wave band and the Ka wave band, the isolation degree is high, the profile is low, the structure is compact, and the broadband phased array antenna is suitable for broadband phased array systems such as satellite communication terminals and mobile platforms.

The invention discloses an antenna unit radiator, a circularly polarized phased-array antenna unit and an antenna array, and belongs to the technical field of antennas. The circularly polarized phased-array antenna unit comprises an antenna unit radiator, a first dielectric layer, a metal patch, a second dielectric layer, a third dielectric layer and a metal ground layer which are arranged in sequence; two L-shaped microstrip probes which are orthogonally arranged are laid on the top of the third dielectric layer; the third dielectric layer is internally provided with feed metal columns in one-to-one correspondence with the L-shaped microstrip probes, the top ends of the feed metal columns are connected with the corresponding L-shaped microstrip probes, and the bottom ends of the feed metal columns are provided with feed ports. The antenna array is formed by the antenna unit array. The working bandwidth of the antenna can be expanded, the defect of the narrow-band characteristic of the microstrip antenna is overcome, the degree of freedom of design of the phased-array antenna is improved, impedance matching is facilitated, and the circular polarization performance of the phased-array antenna array is greatly improved.

The invention discloses a reflection metasurface reverse design method based on deep learning, and the method comprises the steps: generating a corresponding metasurface geometrical shape image according to a given target reflection characteristic through employing a generative adversarial network and combining a conditional generative adversarial network with a Wharisstein generative adversarial network with gradient penalty; and a forward network based on the convolutional neural network is trained to predict reflection characteristics of the metasurface structure, and the reflection characteristics are used as verification of a reverse design result. According to the method, the circular polarization reflection metasurface is designed, time-consuming electromagnetic simulation calculation is avoided, consumption of calculation resources is reduced, and design efficiency is improved.

The invention discloses a broadband dual-circularly-polarized low-cost phased-array antenna array element, which comprises an antenna radiation structure and a slot feed structure which are arranged independently from each other, and is characterized in that the antenna radiation structure comprises a parasitic radiation layer, a first dielectric substrate, an excitation radiation layer and a second dielectric substrate which are arranged in a laminated manner; the slot feed structure comprises a slot layer, a third dielectric substrate, a strip-shaped transmission line and a fourth dielectric substrate; the antenna layer structure and the slot feed structure realize electromagnetic coupling transmission through the slot layer; a hollow symmetrical structure is arranged in the middle of the first dielectric substrate, and the hollow part is used as an air medium to reduce dielectric loss; the gap layer is provided with a multidirectional coupling gap structure; the strip-shaped transmission line is provided with at least two feed ports, and dual circularly polarized radiation is formed in the antenna layer structure through excitation of different feed ports. The antenna radiation layer has no metal through hole or blind hole, can be processed in a layered manner, has the advantages of low processing cost and high yield, and ensures impedance bandwidth while realizing dual circular polarization.

The invention discloses a broadband circularly polarized scattering reconfigurable array antenna based on variable capacitance diode loading, and the broadband circularly polarized scattering reconfigurable array antenna is composed of a plurality of scattering reconfigurable antenna units. The scattering reconfigurable antenna unit comprises a resonance structure used for radiating or receiving signals and a feed and phase shift structure arranged on the lower surface of the resonance structure. The feed and phase shift structure comprises a broadband directional coupler and a reflection type broadband phase shifter. When the scattering reconfigurable antenna unit is in a radiation working state, the broadband directional coupler radiates energy to the resonant structure; when the scattering reconfigurable antenna unit is in a scattering working state, the broadband directional coupler transmits energy to the reflection type broadband phase shifter, and the reflection type broadband phase shifter regulates energy of secondary radiation of the reflection type broadband phase shifter according to bias voltage applied to an internal variable capacitance diode. The array antenna provided by the invention is wide in working frequency band, and the radiation performance can be ensured while the scattering characteristic is reconfigurable.

The invention provides a 1bit circular polarization reconfigurable transmission unit, which belongs to the field of low orbit satellite communication and comprises a radiation patch, a first dielectric substrate, a grounding plate, a second dielectric substrate, a biasing circuit, a third dielectric substrate and a receiving patch which are sequentially arranged from top to bottom, a single side of the radiation patch is slotted and is connected to a first capacitor disc in the center of the grounding plate through a metalized through hole in the center of the first dielectric substrate, an internal patch of the receiving patch is connected to a second capacitor disc through a metalized through hole in the center of the third dielectric substrate, and the second capacitor disc is located on the third dielectric substrate and is connected to the biasing circuit. The external patch of the receiving patch is connected to the biasing circuit through a metalized through hole, and the internal patch and the external patch are bridged through two PIN diodes with the same orientation; the invention further provides an array antenna. Metallized via holes are replaced by capacitor disc coupling, complexity and cost are greatly reduced, structural symmetry is broken through single-side slotting of the radiation patches, conversion efficiency of linearly polarized waves is improved during array forming, and circular polarization performance is improved.

The invention belongs to the technical field of satellite communication and antenna arrays, and relates to a low-orbit satellite ultra-large folded array antenna beam and polarization adaptive calibration system. According to the system, through a feed network of an antenna and a coupler of a satellite-borne detection path, a Jones matrix of each array element is obtained by adopting time division multiplexing excitation, and amplitude and phase calibration in a substrate is realized by utilizing least square pseudo-inverse compensation. Self-adaptive fusion is carried out according to the energy of the left-hand and right-hand circular polarization channels, the residual error of a fusion signal and an ideal signal is calculated, and abnormal array elements are removed in combination with amplitude outlier and phase jump detection. Performing low-rank denoising and sparse correction processing on the phase residual error, calculating the plane coefficient of each substrate through weighted least square plane fitting, and realizing smoothing and compensation iteration by using Kalman filtering and phase updating constraint. And finally, correcting each array element by the spaceborne digital beam forming unit according to the calibration coefficient, thereby realizing accurate calibration of the antenna beam and polarization.

The invention relates to the technical field of optical control, in particular to a micro-nano particle optical control method and device based on circularly polarized light. The invention aims to solve the problem of insufficient flexibility of optical control. The optical control method comprises the following steps: pre-processing micro-nano particles to be controlled; the initial Gaussian beam is processed into a circular polarization tube type beam through a beam shaping module, a light guiding module and a polarization regulation and control module, and the micro-nano particles are irradiated from the position above the gas-liquid interface according to a preset mode; by adjusting the polarization regulation and control module and the light guide module, the motion direction, the motion speed and the stop position of the micro-nano particles are optically controlled. The optical control device comprises a control platform module, a laser emitting module, a light beam shaping module, a light guiding module, a polarization regulation and control module and an imaging monitoring module.

The invention belongs to the technical field of communication, and particularly relates to a broadband, high-gain and circularly-polarized filtering folded transmission array antenna, which comprises a planar integrated feed source antenna, an SIW-Mini-SMP transition structure, a reflection type cross polarization converter RCPC and a transmission type metasurface TMMS capable of effectively generating circularly-polarized electromagnetic waves. The working frequency range of the antenna is 12.0 GHz to 18.3 GHz, the antenna covers the whole Ku wave band, the bandwidth is 41.6%, and the antenna has remarkable broadband characteristics; high gain is kept in the working frequency band, the peak gain is 22.64 dBic, and the advantage of high gain is shown.

The invention discloses a broadband high-isolation millimeter wave dual-circular polarization multi-beam antenna, which comprises a 3D printing medium polarization grating lens and a millimeter wave dual-linear polarization antenna array, and is characterized in that the millimeter wave dual-linear polarization antenna array is located on a horizontal focal plane of the 3D printing medium polarization grating lens. Wherein the millimeter wave dual-line polarized antenna array adopts a folded medium integrated waveguide structure for feeding, so that high isolation is realized. A planarized millimeter wave dual-line polarization antenna array is used as a feed source antenna, and dual-line polarization-dual circular polarization conversion is realized through a 3D printing medium polarization grating lens; and the horizontal and vertical components of the + / -45-degree dual-linear polarized waves are equal in amplitude after passing through the polarized grating lens, and the phase difference is 90 degrees, so that dual-circular polarized waves are formed. The feed source array and the lens are arranged in a spaced mode, high gain and + / -45-degree scanning coverage are achieved, the design problem of a traditional dual-circular-polarization feed source is avoided, the complexity and cost of the system are remarkably reduced, and the deployment feasibility of a 5G / 6G millimeter wave terminal is improved.

The invention discloses a cold atom interference type low-frequency vibration measurement device and a measurement method, and solves the problems that the existing cold atom interference gravimeter measurement equipment is limited by the performance of a vibration sensor, the compensation precision is insufficient, timing calibration is needed, and the measurement precision is low. And measurement errors generated by gravity and ultralow-frequency vibration cannot be effectively separated from a measurement result of the cold atom interference gravimeter, namely, decoupling of two measurement parameters is realized, and cold atom interference measurement of low-frequency vibration is realized. The measuring device comprises a Raman laser output system, a vacuum cavity, a sensitive axis converter and a vibration detection reflecting mirror, the Raman laser output system outputs two pieces of Raman laser which have the same polarization state and are both circular polarization states; the low-frequency vibration is transmitted to the liquid crystal phase modulator through the vacuum cavity for polarization state conversion, and then is reflected to the liquid crystal phase modulator or the vibration detection reflector through the polarization splitting prism, so that the interference type low-frequency vibration of the cold atoms is measured, and decoupling of the two is realized.

The invention provides a microstrip antenna and electronic equipment, and relates to the technical field of antennae, and the microstrip antenna comprises a microstrip antenna body, a first liquid crystal phase shifter arranged at the horizontal polarization feed position of the microstrip antenna, and a second liquid crystal phase shifter arranged at the vertical polarization feed position of the microstrip antenna. The first liquid crystal phase shifter and the second liquid crystal phase shifter are configured to respond to the bias voltage signal to control the phase difference between the horizontal polarization wave and the vertical polarization wave of the microstrip antenna so as to control the microstrip antenna to be switched between the first circular polarization mode and the second circular polarization mode. According to the scheme, the first liquid crystal phase shifter and the second liquid crystal phase shifter are integrated in the microstrip antenna to control the microstrip antenna to be switched between the first circular polarization mode and the second circular polarization mode, so that the integration level of the microstrip antenna is effectively improved, the miniaturization design of the antenna can be realized, and the cost can be reduced.

The electronic equipment provided by the invention comprises a frame and an antenna assembly, and the frame comprises a first edge and a second edge which are connected in a bending manner; the antenna assembly comprises a first radiator, a second radiator and a signal source, and the first radiator is arranged on the first side of the frame; the second radiator is arranged on the second side of the frame; the signal source is configured to be electrically connected with the first radiating body and the second radiating body in the first working mode so as to excite the first radiating body and the second radiating body to receive or emit a satellite communication frequency band at the same time, so that the first radiating body and the second radiating body form an array element arranged on the intersection side of the electronic equipment, and the antenna assembly is an array antenna; the formation of crossed or orthogonal radiation energy is facilitated, and the circular polarization performance of satellite communication or navigation of the electronic equipment is improved.

Described herein is a stacked patch antenna, an array of stacked patch antennas, and a method of fabricating a stacked patch antenna. The stacked patch antenna comprises a ground plane, a first substrate on the ground plane, a first patch on the first substrate having a first diagonal non-radiating center slot from a side of the first patch, a second substrate on the first patch, a second patch on the second substrate having a second diagonal non-radiating center slot from a side of the second patch similar to the side of the first patch, and a feed connector having a first conductor directly connected to the ground plane and a second conductor capacitively connected to the first patch and directly connected to the second patch.

The invention belongs to the technical field of wireless communication, and particularly relates to a broadband circular polarization folding transmission array antenna based on a transceiving unit. The antenna comprises a transmit-receive metasurface, a metal reflection surface and a circular polarization feed source. The transmit-receive metasurface provided by the invention is composed of a plurality of transmit-receive units which are arranged periodically; the circularly polarized feed source provided by the invention adopts SIW feed to excite circularly polarized waves, and the metal reflection surface is integrated on the upper substrate of the circularly polarized feed source. The transmit-receive unit provided by the invention has polarization selection and polarization torsion characteristics, can reflect a left-hand circularly polarized wave incident by a feed source, receives a right-hand circularly polarized electromagnetic wave incident by the feed source, transmits the left-hand circularly polarized wave, and forms a high-gain wave beam in a far-field region through phase compensation and polarization torsion. The antenna has the advantages of low profile (3 / F), circular polarization, high gain and wide bandwidth.

The embodiment of the invention provides a coaxiality calibration system and method. In the system, a calibration transmitting unit transmits first calibration light to an optical fiber branching unit; the optical fiber branching unit transmits the first calibration light to the laser communication terminal; the laser communication terminal converts the first calibration light into circular polarization calibration light and emits the circular polarization calibration light and circular polarization communication light; the calibration reflector reflects reflection calibration light obtained by reflecting the circular polarization calibration light and reflection communication light obtained by reflecting the circular polarization communication light to the laser communication terminal and then transmits the reflection calibration light and the reflection communication light to the optical fiber branching unit. The optical fiber branching unit transmits the reflection calibration light and the reflection communication light to a communication receiving unit of the laser communication terminal; the communication receiving unit detects receiving power; and the controller adjusts the corresponding angle adjusting device in the laser communication terminal based on the receiving power. According to the system, on the basis of the laser communication terminal, by means of an existing controller, accurate coaxiality calibration after the satellite is in orbit can be achieved.

The invention discloses electronic equipment, and relates to the technical field of electronic products. The electronic equipment comprises a satellite antenna, the satellite antenna comprises a feed circuit, a first radiator and a bent radiator, the first radiator is a metal section in a top frame of the electronic equipment, and the first radiator and the bent radiator are arranged at intervals. The first radiating body and the bending radiating body are respectively and electrically connected with the feed circuit; under the condition that the first radiating body and the bent radiating body are respectively connected with a feed signal from the feed circuit, the first radiating body generates a first polarization mode, the bent radiating body generates a second polarization mode, the polarization direction of the first polarization mode is the length direction of the top frame, and the polarization direction of the second polarization mode is the length direction of the top frame. The polarization direction of the second polarization mode is the thickness direction of the electronic equipment, and the first polarization mode and the second polarization mode generate circular polarization.

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 discloses a dual-port coaxial feed circular polarization magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave satellite communication antennas. The antenna comprises a first metal patch layer, a dielectric substrate a, a second metal patch layer, a dielectric substrate b and a metal ground which are sequentially stacked from top to bottom, the second metal patch layer comprises four radiation patches which are arranged in a rectangular array, and each radiation patch is composed of a square patch and a circular ring patch at an inner corner; a metal through hole is formed in the dielectric substrate and is connected with the radiation patch and the metal ground, so that a magnetoelectric dipole radiation path is formed; the first metal patch layer is provided with a probe patch a, the center of the second metal patch layer is provided with a probe patch b, and the probe patch a and the probe patch b form two space orthogonal inverted L-shaped feed probes through a short column and a long column respectively; and the inner conductors of the two feed ports are respectively connected with the long columns of the two probes. The antenna has the advantages of wide impedance bandwidth, wide beam coverage, low profile and easy integration, and is suitable for a low-orbit satellite communication terminal.

The invention discloses a three-dimensional asymmetric photonic crystal laser and a preparation method thereof. An epitaxial structure of the three-dimensional asymmetric photonic crystal laser comprises an N-type electrode, an N-type InP substrate, an N-type Al < x > < 1 > In < 1-x > < 1 > As upper limiting layer, a quantum well active region, a P-type Al < y > < 1 > In < 1-y > < 1 > As electron barrier layer, a P-type Ga < z > < 1 > In < 1-z > < 1 > Asz < 2 > P < 1-z > 2 functional layer, a P-type Al < x > < 2 > In < 1-x > < 2 > As lower limiting layer, a P-type InP connecting layer, a bottom insulating layer and a P-type electrode, wherein a three-dimensional asymmetric photonic crystal is etched on the P-type GaInAsP functional layer, and a chiral characteristic is introduced by destroying the symmetry of the photonic crystal, so that the P-type GaInAsP functional layer vertically emits a single-mode light beam with left-handed or right-handed circular polarization. By designing an asymmetric photonic crystal structure, efficient output of circularly polarized light beams is achieved, polarization selectivity and light beam quality are remarkably improved, and the advantages of low divergence angle and high light beam stability are achieved.

Each antenna element within the array is oriented substantially coplanar with respect to the other antenna elements. The array overlies a primary dielectric substrate. A ground plane layer is spaced apart from the array of antenna elements by a first dielectric spacer. A beam-forming layer is spaced apart from the array of antenna elements by a second dielectric spacer. The beam-forming layer has a set of electrically conductive beam-forming antenna elements overlying a secondary dielectric substrate. A combining network is configured for combining the received electromagnetic signal components from the array, wherein the combining network cooperates to yield or receive a radiation pattern that is generally circularly polarized at the target wavelength range.

Single band and multiband wireless antennas are an important element of wireless systems. Competing tradeoffs of overall footprint, performance aspects such as impedance matching and cost require not only consideration but become significant when multiple antenna elements are employed within a single antenna such as to obtain circular polarization transmit and / or receive. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact single or multiple frequency band antennas which, in addition to providing the controlled radiation pattern and circular polarization purity (where required) are impedance matched without substantially increasing the footprint of the antenna and / or the complexity of the microwave / RF circuit interfaced to them, whilst supporting multiple signals to / from multiple antenna elements in antennas employing them. Solutions present achieve this through provisioning one or more capacitive series reactances discretely or in combination with one or more shunt capacitive reactances.

Disclosed is a spin light emitting device based on two-dimensional material. The light emitting device comprises: a two-dimensional structure configured to emit circularly polarized light in response to spin-polarized carrier injection, wherein the two-dimensional structure is a two-dimensional Van der Waals heterostructure; a spin injector configured to inject spin-polarized carriers into the two-dimensional Van der Waals heterostructure, wherein the light emitted by the two-dimensional structure has a circular polarization state determined by the magnetization state of the spin injector; and a magnetization controller configured to change the magnetization state of the spin injector. The spin-based light emitting device emits circularly polarized light or single photons on the basis of two-dimensional material at room temperature without introducing a magnetic field, and has the capability of electrical control.

The invention discloses a transceiving full-duplex dual-mode three-beam radio frequency component architecture and system, relates to the technical field of radio frequency communication and radar perception integrated front ends, and comprises the following steps: improving the stability of a system power-on process by combining an FPGA (Field Programmable Gate Array) unified trigger mechanism with graded power-on time sequence control of a radio frequency switch, a power amplifier and an LNA (Low Network Alliance); flexible reconstruction of channels 1-4 is realized through combination of a 2 * 2 switch matrix structure and dynamic interconnection of a circulator and a dual circular polarization port, real-time rotation of a polarization state and dynamic adjustment of a beam main lobe direction are realized through combination of a Berry geometric phase algorithm and a dual-stage regulation and control strategy of a reflection array rotation element, the flexibility of beam generation is improved, and the beam generation efficiency is improved. The dual-mode polarization reflection array is combined with the full duplex circulator and the time sequence control module, so that three polarization combination modes under the same hardware platform are realized, and the polarization multiplexing efficiency of the communication system is improved.

Provided is a circularly polarized light emitting display device including: a reflecting electrode; a light emitting element layer; a circular polarization layer; and a selective reflection layer provided between the light emitting element layer and the circular polarization layer, at least part of which is configured to have the same or opposite direction of rotation as or to the circular polarization layer. The circularly polarized light emitting display device. The circularly polarized light emitting display device can completely prevent reflection of external incident light and prevent a decrease in the light emission efficiency of an OLED.

The application provides a design method and device of a polarized light beam splitting metasurface and a light beam splitter, and belongs to the optical technical field.The method comprises the following steps: obtaining a far-field intensity distribution image; performing feature extraction and reconstruction on the far-field intensity distribution image to obtain a right circular polarization phase distribution map and a left circular polarization phase distribution map of the far-field intensity distribution image; inputting the right circular polarization phase distribution map and the left circular polarization phase distribution map into a preset angular spectrum propagation model to recover a metasurface phase distribution corresponding to the far-field intensity distribution image based on the angular spectrum propagation model; and performing polarized light beam splitting metasurface design based on the metasurface phase distribution.The technical scheme can improve the design efficiency of the polarized light beam splitting metasurface.

The multi-phase metasurface holography method based on frequency and polarization decoupling belongs to the field of micro-nano holography. It includes the following steps: generating random phase holograms, multiplying them by a factor K to obtain n different K-fold phase holograms, calculating the mean square error of the output image and label, optimizing the phase of the random phase holograms using an adaptive moment estimation algorithm, multiplying the obtained basic phase by n factors K to obtain n optimized multi-phases, and matching the optimized multi-phases with frequency λ1 and a cross-circular polarization channel to obtain a phase φ; scanning the length and width of each nano-antenna column in the cross-circular polarization channel and the linear polarization channel with frequency λ2 to determine the complex amplitude modulation characteristics of the nano-antenna columns for different frequencies and polarizations, obtaining the corresponding phase distribution. This design of multi-phase metasurface holography based on frequency and polarization decoupling can improve energy conversion efficiency, and different combinations of polarization and frequency also enhance the flexibility of multi-phase holographic modulation.