108 results about "Circular dichroism" 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.

Nanostructured chiral microparticles with bowtie shape having widely variable pitch, size, thickness and length are provided. The self-limited assembly of anisotropic building blocks makes possible high synthetic reproducibility, size monodispersity and computational predictability of their geometries for different assembly conditions. They display multiple strong circular dichroism peaks originating from absorptive and scattering phenomena. Unlike classical chiral molecules, these particles display a continuum of Osipov-Pickup-Dunmur chirality measures that exponentially correlate with the spectral positions of the circular dichroism peaks. Bowtie particles with variable polarization rotation were utilized in printing photonically active metasurfaces with spectrally tunable positive / negative polarization signatures for light detection and ranging (LIDAR) devices.

The invention discloses a dynamic tunable chiral terahertz broadband absorber based on vanadium dioxide, the absorber is formed by periodically arranging M * N absorption units of a multilayer structure in an array, the absorption units are in M * N two-dimensional distribution, and both M and N are positive integers; the absorption unit comprises a metal substrate, a dielectric layer and a resonance layer which are sequentially arranged from bottom to top; the metal substrate and the dielectric layer are rectangular; the resonance layer comprises a J-shaped metal patch, and an inverted-T-shaped vanadium dioxide patch is arranged at one end of the J-shaped metal patch. The terahertz chiral absorber can have a circular dichroism (CD) value larger than 0.8 within the range of 5.36-7.69 THz, the mirror image enantiomer of the terahertz chiral absorber can also achieve a CD spectrum opposite to the mirror image enantiomer, and the terahertz chiral absorber has the advantages of being high in CD, dynamically tunable and simple in structure. In addition, the invention also discloses a preparation method of the dynamic tunable chiral terahertz broadband absorber based on vanadium dioxide.

A terahertz-band metasurface circular dichroic device based on liquid crystal elastomers, and a preparation method therefor. The metasurface circular dichroic device comprises a dielectric layer (1), a plurality of movable structural main bodies (2) and a plurality of liquid crystal elastomers (3), wherein the movable structural main bodies (2) are periodically attached onto the dielectric layer (1); the liquid crystal elastomers (3) are attached to a part of each movable structural main body (2); and the response of the metasurface circular dichroic device can be adjusted by means of structural changes in the movable structural main bodies (2). Circular dichroism values are flexible and adjustable at different frequencies by means of the different bending degrees of microstructural metal sheets (22) inside the movable structural main bodies (2). By means of the attachment of the liquid crystal elastomers (3), the response performance and the flexibility of the metasurface circular dichroic device are further improved, thereby further improving the usage flexibility of detection while simplifying the structure of the circular dichroic device, and facilitating the detection on chiral molecules.

The invention provides a reversible circular dichroism metasurface based on a light-operated phase change material GSST and a regulation and control method of the reversible circular dichroism metasurface. The reversible circular dichroism metasurface comprises a plurality of unit structures which are periodically arrayed along an XOY plane, each unit structure comprises a gold substrate layer, a silicon dioxide dielectric layer and a composite functional material layer which are sequentially stacked from bottom to top in the Z-axis direction; the composite functional material layer comprises a gold material rectangular strip and four GSST material rectangular strips; the gold material rectangular strip is arranged in the middle of the upper surface of the silicon dioxide dielectric layer, and the length direction is parallel to the Y axis; the length directions of the four GSST material rectangular strips are parallel to the X axis, and the four GSST material rectangular strips are perpendicularly connected to the two sides of the two ends of the gold material rectangular strip correspondingly, so that the overall shape of the composite function material layer is of an I-shaped symmetrical structure. Reversible circular dichroism regulation and control are realized, and the circular dichroism regulation and control device has the advantages of simple structure, high response speed and repeatability.

The invention provides an optical module, a debugging method and optical equipment. The optical module comprises a display panel, a first cholesteric liquid crystal film, a first electric control dimming device and a second cholesteric liquid crystal film, the first cholesteric liquid crystal film is arranged on the light emitting side of the display panel, the second cholesteric liquid crystal film and the first cholesteric liquid crystal film have the same circular dichroism, and the second cholesteric liquid crystal film and the first cholesteric liquid crystal film are configured to reflect polarized light with the same rotation direction as the first cholesteric liquid crystal film and transmit polarized light with the rotation direction opposite to the first cholesteric liquid crystal film; the first electric control dimming device is configured to be time division multiplexing, can convert the transmitted polarized light into polarized light with opposite rotation directions in a power-off state, and maintains the polarization state of the transmitted polarized light in a power-on state. According to the optical module, when the polarized light is transmitted and reflected at the first cholesteric liquid crystal film and the second cholesteric liquid crystal film and is emitted from the first electric control dimming device in different polarization states, light loss cannot be generated, and the light emitting brightness and the imaging quality of the optical module can be guaranteed.

Provided are a non-ribosomal antifungal peptide MaAFP1, a preparation method therefor and a use thereof. The molecular formula of the antifungal peptide MaAFP1 is C41H74N18O12, wherein an amino acid sequence from the N-terminus to the C-terminus is (D)Arg-(L)Arg(OH)-(D)Orn-(L)Thr-(D)Orn-(L)Arg(OH)-(D)Tyr. Fermentation is performed by using Metarhizium anisopliae CQMa421, a fermentation broth is collected, and separation and purification are performed by means of ion exchange chromatography and high performance liquid chromatography so as to obtain the antifungal peptide MaAFP1. The structure of MaAFP1 is analyzed by comprehensively using an Edman degradation method, mass spectrometry, infrared spectroscopy, nuclear magnetic resonance spectroscopy, and circular dichroism spectroscopy. By performing an in vitro bacteriostatic test, it is found that MaAFP1 has a good inhibitory effect on a variety of animal and plant pathogenic fungi, and has the value of the development of a novel antibacterial drug.

The invention belongs to the technical field of high polymer chemistry and material science, and particularly relates to application of a salicylaldehyde Schiff base chiral polymer in iron and copper ion detection, and the structural formula of the salicylaldehyde Schiff base chiral polymer is one of the following structures shown in the specification. . The salicylaldehyde Schiff base chiral polymer has high selectivity to copper ions and iron ions, and qualitative detection of the copper ions and the iron ions can be achieved according to changes of ultraviolet absorption spectrums, digital circular dichroism spectrums and fluorescence spectrums before and after coordination of the salicylaldehyde Schiff base chiral polymer with the copper ions and the iron ions.

The present invention provides a method for detecting and identifying molecular chirality based on a composite plasmon chiral nanostructure. The present invention constructs a composite plasmon chiral nanostructure using chiral nanofibers and gold nanorods as basic components, and achieves molecular chirality recognition and detection through plasmon chiral optical amplification. The excellent plasmon circular dichroism optical properties of the composite nanostructure can convert the host-guest chiral recognition interaction occurring at the fiber interface into an asymmetric plasmon chiral optical amplification signal. This technology can detect and identify the chiral enantiomers of amino acid molecules in about 1 minute, with a sensitivity of 10 ‑6 mol / L. This structure can also be used for quantitative analysis of molecular enantiomeric excess (ee), with a detection sensitivity of ±0.05. Furthermore, given that the chiral host-guest complexes involved in this technology are primarily based on hydrogen bonding interactions, the chiral fiber host can be used as a universal substrate for the detection of chiral amino acid molecules.

The invention discloses an adjustable circular dichroism chiral metasurface based on photosensitive silicon. The metasurface is composed of an upper layer photosensitive silicon material, a middle dielectric layer photosensitive silicon material and a substrate silicon material. The circular dichroism chiral metasurface provided by the invention can realize regulation and control of transmissivity and reflectivity in a wave band of 3.35-3.55 THz, so that the circular dichroism of transmission and reflection is regulated. Wherein the maximum value of the transmission circular dichroism can reach 0.62, the minimum value of the transmission circular dichroism is close to 0, and the regulation range is 0.62; the maximum value of the reflection circular dichroism can reach 0.63, the minimum value of the reflection circular dichroism is close to 0, and the regulation range is 0.63. By changing the conductivity of the photosensitive silicon, the wide dynamic regulation and control of the circular dichroism are realized.

The invention belongs to the technical field of biology, and particularly relates to regulation and control of cinnamyl aldehyde on hyperuricemia related gene promoter region G quadruplex. According to the application disclosed by the invention, firstly, the capacity of cinnamyl aldehyde for regulating and controlling a G quadruplex in a hyperuricemia related gene promoter region is explored by utilizing circular dichroism, and the influence of cinnamyl aldehyde on regulation and control of a nucleic acid structure is further evaluated by utilizing a fluorospectro photometer, so that support is provided for a molecular mechanism of cinnamyl aldehyde for relieving hyperuricemia on a gene level. In conclusion, the invention discloses a brand new mechanism that cinnamyl aldehyde regulates and controls uric acid metabolism related genes through a targeted G quadruplex structure, a precise action target and a potential drug development direction are provided for treatment of hyperuricemia, and meanwhile, an established small molecule and G quadruplex interaction verification method provides technical reference for similar research.

The invention discloses a strong circular dichroism chiral metasurface design based on a QBIC resonance structure. The metasurface is composed of two groups of silicon medium rods which are symmetrical about an original point. Each group of medium rods comprises an elliptic cylinder and a long cube, the positions and heights of the elliptic cylinder and the long cube are different, and the elliptic cylinder structure is kept in a floating state. According to the invention, the circular dichroism can reach 0.86 when the wavelength is 657 nanometers, and the circular dichroism in the range of 650-664 nanometers is greater than 0.6, so that an enhanced circular dichroism response function is achieved. The characteristic is derived from a QBIC resonance structure formed by two groups of silicon dielectric rods. By continuously optimizing the structure, the metasurface with a stronger circular dichroism effect can be obtained. The invention provides a novel method for flexibly adjusting and enhancing circular dichroism in nano photonics. By virtue of the unique optical characteristics, the design of the invention is expected to be widely applied in the fields of biosensing, optical communication, quantum technology and the like.

The invention discloses a bionic circular dichroism optical encryption device based on a tiger structure, and the device comprises a first substrate, a first conductive layer, a first electrode patch, an information encryption layer, a second conductive layer, a second electrode patch, and a second substrate. Wherein the information encryption layer adopts a double-layer Z-shaped structure design to simulate a tiger function, an upper layer fixing structure corresponds to a left half tiger of a palm tube, and a lower layer dynamic rotating structure corresponds to a right half tiger held by a user. A ciphertext transmission system is constructed by regulating and controlling three key parameters of an inclination angle, a rotation angle and an electromagnetic wave incidence angle of the lower layer structure, and steganography information can be accurately decrypted by using a specific CD key only when the three key parameters meet preset matching conditions at the same time. According to the invention, the dynamic adjustable circular dichroism (CD) is innovatively realized, and an optical security system for information encryption is constructed through the bionic design of key matching.

The application provides a Fe3O4 nanoparticle microscopic imaging detection method based on left and right polarization modulation, belongs to the technical field of photothermal science and detection and signal processing, and solves the problems that current nanometer single particles are difficult to observe and physical and chemical characteristics are difficult to obtain, and specifically comprises the following steps: determining a sample to be detected and preparing a slide sample; starting a computer, a data acquisition card, a lock-in amplifier, a galvanometer controller and a function generator; starting a power supply of an excitation light and a detection light laser and a refrigerator; setting detection parameters, setting laser power / current parameters, setting modulation parameters, and scanning and detecting the sample to be detected; loading a magnetic field; reading signals from the data acquisition card by the computer to obtain a photothermal detection result image; changing different laser parameters and the size of the magnetic field, repeating the above steps, obtaining a circular dichroism and magnetic circular dichroism detection result, measuring a magnetization curve, and monitoring a single nanoparticle magnetic moment flipping process.

The invention discloses a tunable narrow-band chiral metasurface based on a silicon and germanium-antimony-tellurium composite nanostructure. The tunable narrow-band chiral metasurface comprises a substrate and a silicon and germanium-antimony-tellurium composite chiral metasurface formed on the surface of the substrate, the surface of the silicon and germanium-antimony-tellurium composite chiral super-structure comprises a plurality of silicon and germanium-antimony-tellurium composite chiral nano-structures which are periodically arranged, and each chiral nano-structure is composed of two rectangular nano-rods which are vertically connected and is in an L shape; the silicon and germanium-antimony-tellurium composite chiral nanostructure is a germanium-antimony-tellurium and silicon double-layer chiral nanostructure from bottom to top. The silicon and germanium-antimony-tellurium composite chiral super-structure surface disclosed by the invention can realize narrow-band circular dichroism response in an infrared band, and the wavelength of the narrow-band circular dichroism response can be dynamically adjusted through germanium-antimony-tellurium phase change.

The application discloses a method for detecting glutathione by using manganese-based chiral nanomaterials, and belongs to the field of chemical engineering, specifically to the field of analytical chemistry technology. The method comprises the following steps: taking a dispersion liquid of manganese-based chiral nanomaterials as a detection reagent, mixing the detection reagent with a sample containing glutathione to be detected, and comparing a circular dichroism spectrum signal with a standard curve to obtain the concentration of the sample containing glutathione to be detected; wherein a chiral ligand of the manganese-based chiral nanomaterials is ribose. Based on the circular dichroism spectrum detection, the detection wavelength band used is in the visible light region, is not easy to be disturbed, is sensitive, and the resolution can reach 3 muM, and the detection limit is 1.5 muM, which has important significance and value for promoting the development of the fields of optics, life science, medicine and the like.

The invention discloses a circularly polarized light-emitting diode based on a chiral metasurface and chiral molecular perovskite, and belongs to the technical field of chiral light-emitting diodes. The amorphous silicon layer is provided with a Z-shaped groove array, a perovskite material is filled in a Z-shaped groove, and a corresponding silicon and perovskite layer, namely a chiral metasurface regulation and control light-emitting layer, is formed; the left-hand structure Z-shaped groove is correspondingly filled with a left-hand chiral perovskite material, and the right-hand structure Z-shaped groove is correspondingly filled with a right-hand chiral perovskite material. By using the chiral metasurface of the Z-shaped array structure, the circular dichroism emission of the perovskite fluorescence wave band is realized by adjusting parameters. A chiral structure is combined with perovskite to serve as a light-emitting layer, chiral response of the structure is combined with chiral induced spin selectivity of a chiral perovskite material, and the circular dichroism of a red light LED is enhanced.

The invention discloses a multi-mode circular dichroism chiral metasurface design based on an adjustable material. The metasurface structure is composed of a thermal phase change material VO2 and an electric phase change material Dirac on the upper layer, a polyimide dielectric layer in the middle and a gold substrate. The provided circular dichroism chiral metasurface can achieve regulation and control of the transmissivity and the reflectivity within the frequency band of 0.6-0.8 THz, and then the reflection circular dichroism is effectively controlled. The maximum value of the reflection circular dichroism of the metasurface can reach 0.69, the minimum value of the reflection circular dichroism of the metasurface can be close to 0, and regulation and control functions under four working modes are achieved. By changing the conductivity of the thermal phase change material VO2 and the electrical phase change material Dirac, dynamic regulation and control of four circular dichroism states are realized.

This invention discloses a quasi-BIC optical filter and its chiral modulation method, relating to the field of optical metasurface technology. The method includes: an optical filter based on a metasurface structure, the metasurface comprising several square lattices, each square lattice having an interrupted annular groove etched on it; disrupting the in-plane inversion structural symmetry of the annular grooves in the square lattices of the metasurface to achieve a metasurface-supported quasi-BIC mode, specifically by extending one end of one of the interrupted annular grooves by a certain distance while simultaneously shortening the adjacent ends of adjacent grooves by the same distance, obtaining the transmittance at the quasi-BIC frequency point when switching the transverse magnetic wave in the x-direction of the metasurface to RCP and LCP, and chiral modulation of the circular dichroism of the metasurface based on the transmittance of RCP and LCP.

The application discloses strigasiaticaside A and an extraction method and application thereof, and finds, through chemical component research on the whole grass of striga asiatica, a new synbinaphthyl tetrahydrofuran lignan glycoside, that is, strigasiaticaside A, identifies the chemical structure of the new compound through nuclear magnetic resonance, mass spectrometry, ultraviolet, infrared and circular dichroism spectrum technology.The structure of the new compound is identified as (-) sesamin-5-O-beta-D-glucopyranoside.The anti-hepatitis activity of the new natural product is evaluated by using LPS stimulated HepG2 cells.The results show that when the concentration is 100 muM, the compound has a significant inhibitory effect on the production of inflammatory factors IL-10 and NF-kappa B protein, and has no cytotoxicity, indicating that the compound may have potential anti-hepatitis activity.

The application provides a chiral metasurface optical device, a preparation method thereof and an ultrafast circularly polarized light modulation method, the chiral metasurface optical device comprising a substrate and a chiral oligomer nanosuper surface structure arranged on the substrate, the chiral oligomer nanosuper surface structure being formed by a plurality of short-range ordered distribution of structural identical metal nanometer units; the metal nanometer unit comprises six metal nanometer discs, and the centers of the six metal nanometer discs are located on the circumference of a same circle; the structural chiral characteristic is introduced through the circularly distributed metal nanometer discs, the structure is simple, and the circularly polarized light modulation capacity is strong; through the combination of an excitation light source and a detection light source, the optical characteristic of the chiral metasurface optical device is excited on an ultrafast time scale, and a transient circular dichroism signal is realized; by changing the incident direction of the excitation light source and the detection light source, the sign of the transient circular dichroism signal can be reversed, and the chiral metasurface optical device has an ultrafast response time and a relaxation time.

A circularly polarized light irradiator capable of high-speed and high-sensitivity circular dichroism measurement is provided, as well as an analytical apparatus and microscope using the circularly polarized light irradiator. The analytical apparatus and microscope using the circularly polarized light irradiator include: a light source (20) that emits pulsed light; a polarization separation unit that separates the pulsed light (L1) emitted from the light source (20) or linearly polarized light (L2) extracted from the pulsed light (L1) emitted from the light source (20) into an x-axis polarized light component (L2x) and a y-axis polarized light component (L2y); and a light delay unit (13) that delays the pulsed light of the separated x-axis polarized light component. The pulses (Px) and (Py) of the y-axis polarized light components are delayed relative to the other; the polarization light combining unit coaxially combines the X-polarized pulse beam (L2x) and the Y-polarized pulse beam (L2y) emitted from the light delay unit (13) to generate a linearly polarized beam (L3) with alternating repeating X-polarized light pulses (Px) and Y-polarized light pulses (Py); and the polarization light conversion unit converts the linearly polarized light emitted from the polarization light combining unit into circularly polarized light.

The invention relates to the technical field of micro-nano optics and optical detection, and discloses a chiral super-structure surface and a method for realizing high circular dichroism chiral switching based on humidity regulation and control. The method comprises the following steps: designing a hook-shaped chiral super-structure surface, and paving polyvinyl alcohol hydrogel on a silicon nano brick structure; the volume expansion and refractive index change of the hydrogel along with the humidity change are utilized to realize the regulation and control of the optical response of the super-structure surface; in the process that the relative humidity is from 20% to 42%, the thickness of the hydrogel film layer is increased, the refractive index is reduced, circular dichroism blue shift is caused, the normalized circular dichroism value is switched from-0.8 to + 0.8 in the visible light range, and the bandwidth of the blue shift is about 8 nm. The chiral metasurface structure has the advantages of being high in integration level, excellent in reversibility and good in stability, can be applied to the fields of circular dichroism optical recognition, humidity sensing, dynamic optical information storage and the like, and provides a technical approach for design and implementation of a dynamic integrated optical system.

The application discloses a kind of chiral iron-based nanowires and its preparation method, belong to nanometer material synthesis technical field.The method includes the following steps: the mixture containing iron source, chiral ligand, polyhydric alcohol solvent, base, amine reducing agent is alkaline aqueous solution, reaction, obtains the chiral iron-based nanowires;Chiral ligand is selected from L-cystine and / or D-cystine.This application method is simple, and the morphology of product is uniform, easy to realize large-scale preparation, the two iron-based nanowires of L and D configuration synthesized are all in ultraviolet-visible light region Good circular dichroism spectrum symmetry, for preparing having enantiomeric chiral nanometer material and researching chiral small molecule induced chiral nanometer material synthesis has guiding significance.

The application discloses a manganese-based chiral enantiomeric nanowire and a preparation method thereof, and belongs to the technical field of nanometer material synthesis. The method comprises the following steps: placing a mixture alkaline aqueous solution containing a template agent, a manganese source, a chiral ligand and an alkali in a closed container, and reacting to obtain the manganese-based chiral enantiomeric nanowire. The chiral ligand is selected from L-histidine and / or D-histidine; and the template agent is selected from a cationic surfactant. The two manganese-based superparticles of L and D configurations synthesized in the application have good chiral optical activity in a visible light region, circular dichroism spectrum presents very good symmetry, and the method has important research significance for preparing enantiomeric chiral nanowires by using a surfactant as a template and for researching a chiral ligand-induced chiral nanometer material assembly mechanism.

The application provides a chiral metamaterial absorber for multifunctional sensing and a preparation method thereof, and relates to the technical field of optics.The absorber comprises a periodically arranged three-dimensional double-layer unit structure, each unit structure sequentially comprises a Z-shaped chiral metal layer and a temperature-sensitive semiconductor layer from top to bottom; the material of the Z-shaped chiral metal layer is gold; the material of the temperature-sensitive semiconductor layer is indium antimonide, the dielectric constant of which dynamically changes with temperature, thereby realizing active regulation of circular dichroism in the terahertz wave band.The application realizes strong chiral selective absorption in the terahertz wave band through the periodic three-dimensional structure of the Z-shaped chiral metal layer and the temperature-sensitive semiconductor layer, and has high-sensitivity temperature sensing at 300K-360K and a wide-range refractive index of 1.0-2.0, and high-quality factor guarantees efficient integrated functions.

The invention provides chiral spiral polyisocyanide with a sulfonamide structure as well as a preparation method and application of the chiral spiral polyisocyanide, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: carrying out nucleophilic fluorine exchange reaction on chiral alpha-phenylethylamine and sulfonyl fluoride isocyanide to prepare a sulfonamide modified isocyanide monomer, and initiating the activity of the monomer by adopting a nickel / palladium catalyst to carry out polymerization reaction, thereby preparing the chiral spiral polyisocyanide with a sulfonamide structure. The chiral spiral polyisocyanide with the sulfonamide structure has excellent stability and anti-interference capability, has high specificity to fluorine anions, generates macroscopic color change under visible light, disappears circular dichroism spectrum signals, and has wide application prospects in the field of fluorine ion recognition and detection.

The invention discloses a chiral metasurface construction method based on rotation transformation, a metasurface device comprises a substrate and a chiral metasurface located on the substrate, and the chiral metasurface is a rectangular nanorod array arranged periodically. The metasurface unit is composed of rotating rectangular silicon nanorods, and selective regulation and control of spin angular momentum of incident light are achieved by introducing in-plane mirror symmetry of a geometric rotation destroying structure. Simulation results show that the metasurface shows remarkable circular dichroism at the resonant wavelength of 633 nm, the transmissivity of the metasurface to left-hand circularly polarized light reaches up to 73%, and meanwhile the transmissivity of right-hand circularly polarized light is restrained to 2%. The device has the advantages of compact structure, easiness in integration and the like, and is expected to provide an effective solution for chiral biosensing application.

A circular dichroism measurement apparatus includes a laser light source (QCL) capable of sweeping a wavenumber of a laser light in an infrared wavenumber range containing at least one peak of the sample; a sample chamber where the sample is disposed; a photoelastic modulator that modulates a polarization state of the laser light before or after the laser light of a specific wavenumber in a wavenumber sweep transmits the sample; a detector that detects a variation in intensity of the laser light which transmitted the sample and of which its polarization state is modulated; and a signal processing device that extracts an alternating-current component (AC) that synchronize with a modulation frequency and a direct-current component (DC) from a detected signal of the detector, and calculates a value of infrared circular dichroism of the sample based on a ratio (AC / DC) of the AC and DC.

This invention relates to a chiral device for identifying enantiomers of amino acids, which can be used to distinguish different enantiomeric configurations of the same amino acid. Light is incident from a substrate along the z-direction, passing sequentially through a glass substrate and a gold nanorod composite structure. The gold nanorod composite structure consists of a double L-structure and disjointed tandem nanorods, making full use of gaps and structural asymmetric absorption to achieve a circular dichroism signal of 0.147 in the near-infrared 0.6–1.7 μm band. The refractive index sensitivity at the peak of the circular dichroism spectrum can reach 324 nm / RIU, enabling the identification of amino acid enantiomers.