95 results about "Dextrorotatory" patented technology

The invention provides a chiral super-structure surface and a dynamic regulation and control method for circular dichroism of the chiral super-structure surface, and belongs to the technical field of micro-nano optics. The chiral metasurface can perform differential absorption on vertically incident left-handed circularly polarized light and right-handed circularly polarized light. The chiral metasurface comprises: a substrate layer; the optical waveguide layer is arranged on the substrate layer; the nano structure layer is arranged on the optical waveguide layer and comprises a plurality of Z-shaped nano units which are periodically arranged in a square shape; and the hydrogel layer is arranged on the optical waveguide layer and the plurality of Z-shaped nano units and is used for dynamically regulating and controlling the circular dichroism of the chiral super-structure surface when the environment humidity changes. Under the condition that high circular dichroism of the chiral super-structure surface is achieved, the circular dichroism of the chiral super-structure surface is made to move when the environment humidity changes, and therefore the circular dichroism of the chiral super-structure surface is dynamically regulated and controlled.

The invention relates to a polarization spectrometer, in particular to a pitch-adjustable polarization spectrometer based on cholesteric cellulose chiral liquid crystal. The polarization spectrometer is prepared by adopting the following method: step 1, regulating and controlling the screw pitch of cholesteric cellulose chiral liquid crystal; step 2, preparing a flexible PDMS film; step 3, preparing a patterned PDMS through hole film; 4, treating the surface of the glass sheet; step 5, filling cholesteric cellulose chiral liquid crystals; and step 6, orienting the cholesteric cellulose chiral liquid crystal to obtain the pitch-adjustable polarization spectrometer with the film-shaped patterned cholesteric cellulose chiral liquid crystal. The problems that a traditional small-molecule liquid crystal chiral agent is difficult to regulate and control the screw pitch of the cholesteric phase cellulose chiral liquid crystal and easy to agglomerate can be solved, and simple preparation of the screw pitch-adjustable cholesteric phase cellulose chiral liquid crystal is achieved; and meanwhile, transmission of right-handed circularly polarized light and selective reflection of left-handed circularly polarized light are realized by utilizing the patterned cholesteric cellulose chiral liquid crystal.

The invention provides a metasurface based on spin decoupling and a preparation method thereof. The metasurface comprises a substrate layer and a plurality of rectangular nano columns located on the substrate layer. Wherein the lengths, the widths and the rotation angles of the rectangular nano-columns are different, and the rectangular nano-columns have high transmittance and [0, 2pi] all-phase coverage and meet the conditions of a half-wave plate; the plurality of rectangular nanorods regulate and control the left-handed circularly polarized light and the right-handed circularly polarized light through a preset phase, so that a preset function is realized; the preset phase comprises a propagation phase and a geometric phase. According to the metasurface provided by the invention, the substrate layer and the rectangular nanorod array with various sizes and different rotation angles are fused, so that accurate and independent phase regulation and control on the circular polarization state of incident light are realized, and the constraint of mutual interference of spinning states in a traditional optical element is thoroughly eliminated; different circularly polarized light signals can be distinguished and independently processed under a single wavelength, and the optical regulation degree of freedom is shown.

The invention discloses a vanadium dioxide-based spin coupling and decoupling dynamic switching metasurface. The unit structure of the metasurface is divided into three reflecting layers; a dielectric layer; the metal layer is of an S-shaped structure and comprises a rectangle in the middle and circular arcs at the two ends, the rectangle is made of gold, and the circular arcs are made of vanadium dioxide; when vanadium dioxide is in a metal state, adjusting an opening angle alpha between the arc and the rectangle and a rotation angle theta of the metal layer around an X axis, and realizing decoupling of left-handed polarized light and right-handed polarized light through combination of a PB phase and a transmission phase; when vanadium dioxide is in an insulated state, the PB phase is regulated and controlled only by rotating the angle theta, and coupling of left-handed polarized light and right-handed polarized light is achieved. Compared with other coding metasurfaces, the modulation mode is simpler, the design is more flexible, the functions are more diversified, the defect that the function of the metasurface is fixed is overcome, the coupling characteristic and the decoupling characteristic of left-handed and right-handed polarized light are integrated together, and the application prospect of a coding metasurface device is expanded.

The invention provides a polarization adjustable spin decoupling metasurface based on a perovskite material. The metasurface is characterized in that the metasurface is of a three-layer structure, namely a perovskite and metal pattern layer (1), an intermediate dielectric layer (2) and a reflection bottom layer (3) from top to bottom in sequence. When the perovskite is in a metal state, the designed metasurface can independently adjust left-handed and right-handed circularly polarized light; when the perovskite is in an insulated state, the designed metasurface can independently adjust x and y linear polarized light; by switching the state of the perovskite, the phases of the circularly polarized light and the linearly polarized light can be regulated and controlled at the same time, so that different functions are realized. The optical metasurface designed by the invention has huge potential in a terahertz frequency band, and can be widely applied to beam shaping, holographic imaging, information encryption, super lenses and the like.

The utility model relates to the technical field of optics, is used for solving the problem that display of a display screen is in a gray white shape when the screen is turned off, and provides a display screen which comprises a display layer, a touch layer / cover plate layer and an optical rotation integrated black composite film arranged between the display layer and the touch layer / cover plate layer and used for the display screen. The optical rotation integrated black composite film for the display screen comprises a quarter-wave plate layer, a polaroid layer and an adhesive layer which are sequentially arranged in a stacked mode, the quarter-wave plate layer is arranged on the light emitting side of a display layer in an attached mode, and the adhesive layer is arranged on the inner surface side of a touch layer / cover plate layer in an attached mode; ambient light is converted into first linear polarized light through the polaroid layer during incidence; the polarized light is converted into left-hand circularly polarized light or right-hand circularly polarized light through the quarter-wave plate layer; when the ambient light is emitted, the ambient light is reflected and converted into reverse right-handed circularly polarized light or left-handed circularly polarized light through the display layer; the second linear polarized light is converted into second linear polarized light through the quarter-wave plate layer and is blocked by the polaroid layer, so that the display screen displays integrated black after the screen is turned off.

According to the indirect image encryption method based on the polarization multiplexing metasurface, the used phase gradient metasurface is composed of nanometer bricks with singular point characteristics and mirror image structures of the nanometer bricks, when left-hand circularly polarized light and right-hand circularly polarized light are incident, the corresponding structures of the nanometer bricks play a role respectively, two holograms are constructed in a far field, and polarization multiplexing is achieved; on the basis that two structures are arranged in the column direction to form a super unit, when x-ray polarized light is incident, light is subjected to non-abnormal reflection through the generalized Snell law, required RCP and LCP are filtered out, and emergent light is superposed to generate vector light; performing condition limitation on the azimuth angle of the vector light through a simulated annealing algorithm to obtain two encrypted patterns; the encrypted pattern needs to be obtained by analyzing the polarization of the emergent light to obtain a corresponding Stokes parameter and then constructing a decryption function related to the Stokes parameter for calculation and analysis; therefore, the metasurface for realizing polarization multiplexing and indirect encryption functions of incident light in different polarization states is constructed.

The invention relates to the technical field of solid-liquid interfaces and liquid drop movement and control, in particular to a method and device for achieving left-right controllable spontaneous rotation of liquid drops based on light induction, and the method comprises the following steps that acid liquid drops containing photoacid are dropwise added to the surface of liquid metal; a light source system is adopted to irradiate liquid drops on one side of the liquid drops, the liquid drops are induced to locally release non-uniform H < + > ions, and interface chemistry is initiated to generate gradient change distribution; the light intensity generated by the light source system promotes the formation of asymmetric tension distribution on the liquid drop and liquid metal interface, and drives the liquid drop to rotate along a preset direction; and by changing the irradiation position, the liquid drops can be switched between left rotation and right rotation. According to the present invention, by using the mechanism of combining the interface Marangoni effect and the light-induced acidity regulation and control, the stable and rapid spinning behavior of the liquid drop can be represented by adjusting the position, the irradiation time and the irradiation intensity of the illumination region, and the rotation direction can be reversibly switched between the left rotation and the right rotation.

The invention relates to a preparation method of an entangled light source based on a grating and a perfect vortex metasurface, and the method comprises the steps: providing a Gaussian beam, carrying out the linear polarization of the Gaussian beam in a specific polarization direction, and generating signal light and idle light through a periodically poled potassium titanate crystal; after the photons are collimated, the polarization states of the signal light and the idle light are changed through a 1 / 4 wave plate, and the signal light and the idle light are respectively converted into right-handed circular polarization and left-handed circular polarization; the Gaussian beam passes through the perfect vortex metasurface to obtain a geometric phase changing along with space; through the one-dimensional grating, the left-handed perfect vortex light and the right-handed perfect vortex light are separated to output an overlapped part entangled state; and respectively coupling the photons in the two paths into an optical fiber, and transmitting the photons to a single-photon detector to record a coincidence number.

According to the method and system for achieving orbital angular momentum multiplier multiplexing based on the metasurfaces, two cascaded metasurfaces are arranged, the first metasurface executes different orbital angular momentum multiplication on circularly polarized light which is incident in a left-and-right rotation mode at an input plane to convert phases, and the second metasurface executes different orbital angular momentum multiplication on circularly polarized light which is incident in a left-and-right rotation mode; the left-hand circularly polarized light and the right-hand circularly polarized light respectively execute multiplication operation of different orders; and the light beam evolves after being propagated for a certain distance, and is output after being subjected to phase collimation by the second metasurface at the output plane, so that multiplexing of different order multiplication functions of vortex light orbital angular momentum on the metasurface is realized. According to the method, the multiplication order of the orbital angular momentum is remarkably increased while the complexity of the system is not increased, the method can work in a broadband, the robustness is good, and the method is suitable for highly integrated and miniaturized development of an optical system.

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.

The present invention relates to the technical field of molecular optoelectronic devices, and specifically discloses a chiral molecule, a chiral molecular device, a preparation method thereof, and an application in circularly polarized light detection. Among them, the chiral molecule is a functional molecule containing a chiral center and having a "D-A-D" structural type. The chiral molecular device includes: a silicon substrate, an aluminum oxide dielectric layer, a metal electrode, a graphene dot electrode, and an RE-PDI molecule, which is applied in circularly polarized light detection. The present invention designs and synthesizes a functional molecule RE-PDI containing a chiral center and having a "D-A-D" structural type, and assembles it between the graphene dot electrodes with a nanogap by a chemical decoupling method. By utilizing the differential response of the RE-PDI molecule to different types of circularly polarized light, the differential detection of left-handed and right-handed circularly polarized light and the dynamically periodic adjustable response can be stably achieved.

The present application relates to the technical field of organic synthesis, and particularly relates to a method for preparing (+)-crispine A by means of biological enzyme resolution. First, 6,7-dimethoxy-3,4-dihydroisoquinoline-2-oxide is subjected to 1,3-dipolar cycloaddition with allyl alcohol to obtain a first compound; then the first compound is added into a sulfonylation reagent and zinc powder to obtain a racemate second compound through a three-step continuous series reaction of primary alcohol sulfonylation, nitrogen-oxygen bond cleavage and ring formation; then the second compound is mixed with vinyl acetate and biological enzyme, and chiral resolution is carried out under the action of the biological enzyme to obtain a third compound with right-handed optical rotation and a fourth compound with left-handed optical rotation; finally, the third compound is mixed with an alkaline reagent and a sulfonylation reagent, and then secondary alcohol sulfonylation is carried out to obtain a fifth compound with right-handed optical rotation; the fifth compound is mixed with a deoxidizing reagent to carry out deoxidation reaction, and (+)-crispine A is prepared. The method is simple, green and environmentally friendly, and can be produced in large quantities.

The invention provides an optical mixer based on metasurface integration and a preparation method thereof, and belongs to the field of mixers. The mixer comprises a circularly polarized light beam splitter which comprises a first substrate, a liquid crystal structure, a second substrate and a nanorod array which are stacked in sequence; the nanorod array is used for separating the signal light and the local oscillation light into signal light left-handed rotation light, signal light right-handed rotation light, local oscillation light left-handed rotation light and local oscillation light right-handed rotation light; the liquid crystal structure is used for regulating and controlling the initial phases of the output left-handed light and right-handed light; the first multimode interference coupler is used for receiving and mixing the signal light left-rotation light output by the circularly polarized light beam splitter with the local oscillation light left-rotation light to obtain four paths of left-rotation polarized light components with different phases; and the second multimode interference coupler is used for receiving and mixing the right-handed light of the signal light output by the circularly polarized light beam splitter with the right-handed light of the local oscillation light to obtain four paths of right-handed polarized light components with different phases.

This invention discloses an α-indolylpyrrolo[1,2-a]indole derivative and its preparation method. The derivative is a levorotatory or dextrorotatory optically active form or racemate with the following structural formula: The preparation involves using α-indolylpropynyl alcohols and indole compounds as raw materials, and 3,5-bis(trifluoromethyl)phenylbinaphthylphosphonic acid as a catalyst, reacting in an organic solvent to obtain the α-indolylpyrrolo[1,2-a]indole derivative. This invention utilizes an organophosphate-catalyzed tandem reaction of two components to synthesize the α-indolylpyrrolo[1,2-a]indole derivative. The reaction conditions are mild, the process is simple, and the operation is convenient. The obtained product is the core skeleton of the indole bases of the natural products isoborreverine and dimethyl isoborreverine, which is of great significance for the synthesis of analogs of these natural products.

The invention discloses a preparation method and application of a double-layer composite film with circularly polarized light (CPL) characteristics, and belongs to the technical field of optical materials. According to the invention, a double-layer composite film for finely dividing an optical functional area is designed, a micron-sized fluorescent material is deposited on the bottom layer of the film and is only used for photoluminescence, and cellulose nanocrystals (CNC) are compounded above the fluorescent layer and are only used as an optical filter for selectively transmitting right-handed circularly polarized fluorescence; by controlling the volume of the CNC solution, a thin film with a high asymmetry factor (Glum) and an adjustable Glum factor is obtained. The preparation method breaks through the size limitation that only nanoscale fluorescent powder can be blended with CNC (computer numerical control) to obtain circularly polarized light fluorescent powder in the prior art, greatly expands the selection range of optical inactive materials for obtaining circularly polarized light, is simple and convenient to prepare and operate, is green and environment-friendly, is beneficial to actual production, and is expected to promote the progress of optical anti-counterfeiting.

The application discloses a waveguide device, a near-eye display system and a near-eye display method for improving light efficiency, and belongs to the technical field of waveguide diffraction. The waveguide device for improving light efficiency comprises two polarized light processors, which are used for receiving mutually orthogonal first polarized light and second polarized light, wherein one of the first polarized light and the second polarized light is left-handed polarized light, and the other is right-handed polarized light; the polarized light processor is used for coupling in the first polarized light and transmitting the second polarized light, and coupling out the first polarized light after converting the first polarized light into the second polarized light; an intermediate phase modulation element is arranged between the two polarized light processors, and the intermediate phase modulation element is combined with a polarized light processor to realize conversion of the second polarized light transmitted through the polarized light processor into the first polarized light, and make the converted first polarized light incident to the other polarized light processor; wherein the light emission directions of the second polarized light coupled out by the two polarized light processors are on the same side. The application can reduce light loss and improve waveguide display brightness.

This invention discloses a circularly polarized room-temperature phosphorescent organic cocrystal, its preparation method, and its applications. The organic cocrystal is formed by the self-assembly of chiral donor and acceptor molecules. The chiral donor molecule is S / R-1-(1-naphthyl)ethanol, and the acceptor molecule is 1,2,4,5-benzenetetracarbonyl nitrile. The levorotatory or dextrorotatory chiral donor and acceptor molecules are dissolved in a good solvent, then a poor solvent is added. The mixture is sonicated until completely dissolved and allowed to stand until the solvent completely evaporates, yielding the organic cocrystal. Both the levorotatory and dextrorotatory chiral cocrystals exhibit green phosphorescence emission upon excitation. The lifetime of the levorotatory chiral cocrystal is 24.91 ms, and that of the dextrorotatory chiral cocrystal is 28.48 ms. The cocrystals exhibit excellent circularly polarized room-temperature phosphorescence performance, with the levorotatory chiral cocrystal achieving a phosphorescence efficiency of 22.43% per g. lum | is 0.03. The phosphorescence efficiency of the dextrorotatory chiral eutectic is 30.97%, | g lum | is 0.065.

A display panel comprising a plurality of pixels including a first sub-pixel (SP1), a second (SP2) and third subpixel (SP3) disposed on the substrate, and a reflective layer (180) with reflective portions (181, 182, 183) corresponding to each sub pixel (SP1, SP2, SP3) of differing thickness depending on the sub pixel. The reflective layer serves as a conventional polariser and light concentrating layer transmitting right-circulatory polarised light and reflecting left-circularly polarised light. Embodiments include those where the first reflective potion (181) is thicker than the second reflective portion (182), where the reflective portions include cholesteric liquid crystals which may differ in pitch, comprises a colour filter (CF) between the pixel and reflective layer and / or comprises an encapsulation layer with portions of differing thickness between the pixel and reflective layer. Further embodiments include those with alignment film with alignment regions disposed between the plurality of pixels and in-between the reflective and colour filter layer, or those with a lens portion on the display panel. Also disclosed is a display panel comprising a plurality of pixels, a colour filter and a cholesteric liquid crystal layer with portions of differing thickness.

The application relates to a preparation method and application of chiral two-dimensional cadmium sulfide nanosheets. The application aims to solve the problem that it is difficult to construct non-layered chiral two-dimensional inorganic nanomaterials. The method comprises the following steps: placing a first open reaction container and a second open reaction container in a sealable container, adding a cadmium acetate solution into the first open reaction container, then adding a left-rotational ibuprofen / chloroform solution drop by drop, adding a sodium sulfide aqueous solution into the second open reaction container, then adding a hydrochloric acid solution drop by drop, and finally sealing and standing. The application is used for preparing a circularly polarized light detection device for detecting left-rotational / right-rotational circularly polarized light. The application is used for the preparation and application of chiral two-dimensional cadmium sulfide nanosheets.

The present invention provides a stereoscopic projection device, comprising: a projector, the projector including a lens assembly for emitting partially polarized light; and a polarization stereoscopic conversion device, the polarization stereoscopic conversion device including a 3D light valve, the 3D light valve being rotatably mounted to the light-emitting side of the lens assembly and arranged parallel to the lens assembly, so that the partially polarized light passing through the 3D light valve is converted into left-handed circularly polarized light and right-handed circularly polarized light. When the partially polarized light emitted by the lens assembly experiences a light spot shift, the 3D light valve is rotated and adjusted based on the polarization characteristics of the partially polarized light and the rotational symmetry of the light valve. The light valve has the same effect on the light polarization before and after rotation, and the 3D light valve covers the current light spot range formed at the 3D light valve by the light emitted from the lens. By utilizing rotational displacement, a small light valve can achieve the same effect as a large light valve that covers the entire area of ​​the light spot shift. Using the above method, the light valve area can be reduced, the light valve weight can be reduced, and the cost of the stereoscopic projection device can be reduced.

A microdrone is adapted to, selectively under illumination, trap and transport a particle. The microdrone comprises a plurality of motion-promoting antenna structures and a trapping-field-promoting antenna structure. The plurality of motion-promoting antenna structures comprises a first motion-promoting antenna structure and a second motion-promoting antenna structure. Each of the first and the second motion-promoting antenna structures exhibits a respective optically addressable resonance at a respective first resonance wavelength. Each of the first and the second motion-promoting antenna structures is adapted to scatter incoming, circularly polarized light at the respective first resonance wavelength such that at least a fraction of a momentum of the incoming, circularly polarized light is transferred to the microdrone. The trapping-field-promoting antenna structure exhibits an optically addressable resonance at a second resonance wavelength. The trapping-field-promoting antenna structure is adapted to provide, under illumination with incoming light at the second wavelength, a gradient force directed at the trapping-field promoting antenna structure both for left-handed circularly polarized incoming light at the second wavelength and for right-handed circularly polarized incoming light at the second wavelength.

The invention relates to a galvanometer type laser fuze discrimination method and system for circular polarization rotation coding. The system comprises a laser, a circular polarization encoder, a micro galvanometer module, a light splitting module, a polarization filtering module, a photoelectric detector and a decoding discrimination module. The micro galvanometer module comprises an MEMS galvanometer A, a rotating shaft and an MEMS galvanometer B; the polarization filtering module comprises a left-hand circular polarization filter A and a right-hand circular polarization filter B; according to the invention, double coding of circular polarization and time is carried out at the laser incident end, so that strong marking of incident signals is realized, and the problem of range ambiguity during long-distance laser ranging can be effectively solved; and an orthogonal rotation circular polarization decoding discrimination method is adopted at the emergent end, so that the influence of back scattering light can be inhibited, the signal-to-noise ratio of the system is further improved, and the method is particularly suitable for discrimination of target reflection signals in a nitrate smoke environment and a heavy fog special environment.

The present invention discloses a complex amplitude vector light field system based on a terahertz on-chip metasurface, comprising a metasurface region and an intrinsic region spliced ​​together in the horizontal direction, a plurality of compound metaperiodic units arranged along the horizontal and vertical planes, and an intrinsic primitive cell. The plurality of compound metaperiodic units arranged along the horizontal and vertical planes are arranged in the metasurface region, each compound metaperiodic unit comprises a 2*2 array of metasurface primitive cells, each metasurface primitive cell comprises a metal microstructure layer, a first dielectric film layer, and a first metal thin layer arranged in sequence along the vertical direction, and the metal microstructure layers of the plurality of metasurface primitive cells are rotated and arranged according to a required phase distribution; the odd-numbered columns in the compound metaperiodic units radiate left-handed circularly polarized complex amplitude light fields, and the even-numbered columns radiate right-handed circularly polarized complex amplitude light fields, and a vector light field with a preset polarization state is synthesized through interference of left-handed circular polarization and right-handed circular polarization in free space.

This invention discloses a chiral gold-silver-platinum alloy nanomaterial, its preparation method, and its applications, relating to the field of metal nanomaterials technology. The invention includes: a substrate, wherein the substrate is chiral helical gold-silver alloy nanoparticles, and the substrate has a left-handed or right-handed helical morphology; and platinum nanoparticles, wherein the platinum nanoparticles are selectively deposited on the helical edges of the substrate by photodeposition, and the chiral helical morphology of the substrate is preserved after deposition. The photodeposition method is a photodeposition reaction performed under circularly polarized light irradiation with a specific helical direction. This invention provides more active sites for catalytic reactions and effectively avoids the displacement etching of the gold-silver alloy shell by platinum in traditional deposition methods, preserving the complete helical chiral structure.

The invention discloses a vector vortex light stimulated Brillouin scattering device and method, and relates to the technical field of nonlinear light. The method is characterized by comprising the following steps of: adjusting a polarization included angle between laser in a linear polarization state and a vortex wave plate main shaft through a half-wave plate, and then entering the vortex wave plate to generate a radial or angular vector vortex light beam; the vector vortex light beam is separated into vertical polarized light and horizontal polarized light through a first polarization beam splitter; one-way transmission, energy amplification and reflection are successively carried out on the vertical polarized light and the horizontal polarized light respectively, the vertical polarized light and the horizontal polarized light are coupled to a stimulated Brillouin scattering medium to carry out a stimulated Brillouin scattering nonlinear effect, and left-handed and right-handed circularly polarized reverse Stokes light is generated and converted into horizontal and vertical reverse Stokes light respectively; and then beam combination is carried out through the second polarization beam splitter, so that stimulated Brillouin scattering output of the vector vortex light is realized. The Brillouin conversion device is compact in structure, small in size, high in stability and practicability and capable of achieving high Brillouin conversion efficiency.

This invention relates to a polarization-customized holographic device based on a spin-decoupled plasmonic metasurface, belonging to the fields of micro-nano optics, diffraction optics, and holographic imaging. The device employs a three-layer metal-dielectric-metal reflective structure, consisting of a bottom metal reflective surface, an intermediate dielectric spacer layer, and a top anisotropic metaatomic layer. The top metaatomic layer is composed of various periodically arranged metaatoms. By superimposing the propagation phase and geometric phase, phase decoupling between left-handed circular polarization (LCP) and right-handed circular polarization (RCP) is achieved, allowing independent control of their phase delays. Precise customization of the output linear polarization direction is achieved by adjusting the phase difference between the two. This invention breaks the lock-in relationship between geometric phase and spin state in existing metasurface holographic devices, achieving highly integrated, high-quality polarization-customized holographic imaging. It exhibits stable performance over a wide spectral range and large incident angles, and can be widely applied in optical encryption, secure displays, and optical communications.

The application provides a visible band photonic spin Hall device based on a plasmonic metasurface, which comprises: an anisotropic metasurface, which is designed based on a PB geometric phase principle and is formed by periodic arrangement of supercells; the supercells are arranged by homochiral superatoms every interval p and rotation angle by turns, so that the last superatom of each supercell rotates 180 DEG relative to the first superatom; the superatom is a half-wave plate working in a wide frequency visible light band, that is, when left-handed or right-handed circularly polarized light is incident on the superatom, the reflected light is converted into right-handed or left-handed circularly polarized light; under parallel circularly polarized light incidence, the reflected circularly polarized light of the metasurface device follows the generalized Snell law, and left-handed light and right-handed light are reflected towards opposite directions respectively, that is, a photonic spin Hall effect is generated.

This invention discloses a spin-correlated metalens and a classification system including it. The metalens comprises a substrate and nanostructure units on top of it. The nanostructure units include nanopillars A and B, which are arranged alternately in a square lattice. Incident light passes through the metalens to obtain left-handed and right-handed circularly polarized outgoing light. Nanopillars A and B introduce propagation phase delay through their structural dimensions and geometric phase through rotation angles, respectively, thereby jointly achieving independent amplitude and phase modulation of left-handed and right-handed circularly polarized light. This invention, by combining spin-correlated metalens with polarization phase-shift interference reconstruction, overcomes the physical limitations caused by the loss of point spread function phase information under incoherent imaging conditions. It realizes incoherent optical loading and convolution calculation of arbitrary signed, trainable convolution kernels in the intensity domain, fundamentally solving the problem that traditional incoherent optical systems cannot perform positive and negative weighted convolution.