52 results about "Radiation loss" patented technology

The invention discloses an optimization method of a low-loss bending waveguide, which comprises the following steps: firstly, adopting NA bending as a basic bending path, determining two optimal boundary NA curves for a given equivalent bending radius Reff, and forming a width gradually-changed NA bending waveguide structure; lateral shift amounts din and dout are introduced into the input end and the output end of the constructed NA bending waveguide structure with the gradually-changed width respectively, and optimal lateral shift amounts din and dout are obtained through step-by-step parameter scanning and simulation optimization; and based on the optimal lateral shift amounts din and dout, obtaining a curved waveguide structure combining an NA curved path, width gradient and a specific lateral shift parameter. According to the method, the mode mismatch loss and the radiation loss can be remarkably reduced at the same time for the NA bending waveguide with the ultra-small radius, and the total transmission loss of the bending waveguide is further reduced on the basis of the prior art.

The utility model discloses a heating plate thermal insulation device for pultrusion, which comprises a heating plate, a pultrusion mold matched with the heating plate is fixedly connected onto the inner wall of the heating plate, heat conduction pipes are mounted on the outer walls of two ends of the heating plate, and a thermal insulation device matched with the heating plate is fixedly connected onto the outer wall of the heating plate. The heating plate heat preservation device for pultrusion is characterized in that the heat preservation device is of a multi-layer composite structure, the multi-layer composite structure comprises a heat preservation plate outer layer, a heat preservation plate middle layer and a heat preservation plate inner layer, and a heating plate plug port is formed in the outer wall of one end of the heating plate. The heat preservation layer is completely attached to the outer wall of the heating plate, the problems of heat preservation dead corners, serious heat loss and the like of the heating plate are solved, the heat preservation layer is of a multi-layer composite structure, heat conduction, convection and radiation loss are effectively prevented, the energy utilization rate is increased, and the pultrusion quality is guaranteed.

A diffraction grating coupler (10) is provided with: a diffraction grating (12) having a plate-shaped base material (121) and different refractive index regions (122) that are periodically arranged in a one-dimensional or two-dimensional manner within a predetermined range of the base material (121) and have a refractive index different from that of the base material (121); and a light reflecting section (14) provided at an end of the range on the opposite side from the light input section (13) side, the different refractive index region (122) having a planar shape in which the absolute value of the direct coupling coefficient (kappa 1D) is less than 1 / L, the direct coupling coefficient (kappa 1D) is an index indicating the intensity of light traveling from the light input unit (13) in a first direction (positive x-direction) parallel to the base material (121) reflected in the different refractive index region (122) in a second direction (negative x-direction) that differs by 180 DEG from the first direction (positive x-direction) without any radiation loss. The 1 / L is the reciprocal of the span length (L) of the range in relation to the first direction (positive x direction), and the light input portion (13) is a part of the end portion of the range.

The invention provides a bismuth-doped optical fiber and a preparation method and application thereof, the bismuth-doped optical fiber realizes C + L full-band positive gain through cooperation of Bi, Ge, La and Y and component proportion optimization: Bi is a core active component to form a BACS to generate near-infrared gain; la and Y improve the BACS concentration, inhibit non-radiation loss and enhance the gain efficiency; and the Ge adjusts the refractive index of the fiber core to guarantee stable optical transmission. According to the optimization, the problem of negative gain of the traditional BDF in the C + L wave band (especially 1524nm) is solved, the noise is reduced, and the practical value of broadband communication is improved.

The invention provides a low-noise single-frequency laser, which comprises a linear resonant cavity for realizing light field local constraint and gain amplification, and is characterized in that the linear resonant cavity comprises a gain optical fiber, an all-dielectric C-waveband narrow-band high-reflection metasurface structure and a miniature BIC high-Q-value metasurface structure; the first end of the gain optical fiber is welded and fixed with the all-dielectric C-waveband narrow-band high-reflection metasurface structure, and the second end of the gain optical fiber is welded and fixed with the miniature BIC high-Q-value metasurface structure; wherein the all-dielectric C-waveband narrow-band high-reflection metasurface structure is used for screening a C-waveband target wavelength through a narrow-band high-reflection characteristic and suppressing a non-target mode at the same time; the miniature BIC high-Q-value metasurface structure realizes a high-Q-value characteristic by suppressing radiation loss, so that the laser line width is efficiently compressed, and noise is suppressed. The low-noise single-frequency laser provided by the invention can finally realize low-noise and narrow-linewidth single-frequency laser output.

The invention belongs to the technical field of optical microscopic imaging, and discloses a microscopic imaging system and a stimulated radiation loss microscope. The microscopic imaging system comprises an illumination mechanism used for providing a first light beam and a second light beam which are coaxially incident; the phase modulation optical device comprises multiple layers of diffractive optical elements, and the multiple layers of diffractive optical elements are arranged at intervals in the transmission direction of the first light beam and the second light beam and used for conducting phase modulation and convergence on the first light beam and the second light beam in a matched mode. And the first light beam and the second light beam can form a first light spot and a second light spot at the focal plane of the stimulated radiation loss microscope, and the first light spot and the second light spot are in one-to-one correspondence and coincide in center. According to the technical scheme of the invention, the stimulated radiation depletion microscope can be normally matched with a commercial laser which has a large bandwidth and wavelength drift and is used as an excitation beam and a depletion beam.

The application discloses an anti-interface rough scattering quantum cascade laser active region and a preparation method thereof. The application forms a topological interface state protected by chiral symmetry as a lasing upper energy level at the butt joint interface between a first superlattice region and a second superlattice region, the wave function of the topological interface state is strictly zero in the thick barrier center and the interface, thereby the non-radiation loss caused by the interface roughness scattering is inhibited from the root, and the upper energy level carrier lifetime is significantly prolonged. Based on this, the threshold current density of the quantum cascade laser is greatly reduced, and high-efficiency lasing of 10 μm wavelength can be realized at room temperature. Meanwhile, a mixed epitaxy process combining molecular beam epitaxy and metal organic chemical vapor deposition is adopted, the nanometer precision energy band design of the core active region is ensured, and the efficient growth of the thick film waveguide layer is realized, which is beneficial to the practicalization and large-scale preparation of the device.

The invention belongs to the technical field of microwave communication, and particularly discloses a low-loss differential transmission line structure based on a common dielectric layer. According to the invention, the technical means of alternately laminating multiple transmission layers and dielectric layers and arranging through holes for vertical interconnection is adopted, so that an electromagnetic field is distributed in the air above and below the conductor as much as possible, and the side surface of the signal transmission conductor is grooved, so that the dielectric loss of the substrate is directly reduced; signal transmission conductors are connected through high-density metalized through holes, so that signal current can flow in parallel in a plurality of metal layers through the through holes, the equivalent cross sectional area of current circulation is remarkably increased under the high-frequency skin effect, the equivalent resistivity is reduced, and the conductor loss is reduced; meanwhile, the grounding conductors are connected in parallel through the through holes, an electromagnetic field is bound around the signal transmission conductor, and radiation loss and mutual interference are restrained to the maximum extent. Compared with the prior art, the effects of greatly reducing high-frequency loss and improving signal integrity on a common dielectric layer are achieved.

The metasurface resonator comprises a plurality of unit structures arranged periodically, each unit structure comprises a substrate layer and an L-shaped metal column, the L-shaped metal column is arranged at the center of the upper surface of the substrate layer, and the L-shaped metal column is arranged at the center of the upper surface of the substrate layer. The L-shaped metal column is composed of two cuboid metal columns which are perpendicular to each other, and the heights of the two cuboid metal columns which are perpendicular to each other are adjusted through a height scaling factor. By adjusting the height scaling factor of the metasurface resonator, the dissipation characteristic of the resonance mode supported by the metasurface resonator can be controlled, when the height scaling factor is reduced, the local state of the high-loss and low-quality factor supported in the metasurface resonator is evolved into the non-local state of the low-loss and high-quality factor, and the local state of the high-loss and low-quality factor is changed into the non-local state of the low-loss and high-quality factor. And non-local plasmon resonance with smaller radiation loss, narrower line width and higher quality factor is excited. By using the non-local plasmon resonance of the high-quality factor, the GH displacement can be greatly enhanced.

The utility model discloses a strip line feed-in directly modulated laser, which comprises two parallel ceramic circuit boards, a ceramic dielectric layer is clamped between the two groups of ceramic circuit boards, the ceramic circuit boards and the ceramic dielectric layer form a microstrip line, and a metal layer is arranged on the inner surface of each ceramic circuit board to form a closed radio frequency transmission line. The ceramic dielectric layer is clamped between the two parallel ceramic circuit boards to form the closed microstrip line structure, and the laser chip is embedded in the microstrip line, so that direct feed-in of radio frequency signals is realized, gold wire connection is not needed, parasitic parameter influence caused by gold wires is eliminated fundamentally, and the service life of the laser is prolonged. The microstrip line is designed in a closed mode, electromagnetic waves are effectively prevented from being diffused to the surrounding space, radiation loss in the signal transmission process is reduced, meanwhile, the crosstalk risk between adjacent circuits is reduced, and the overall performance and reliability of a system are improved.

The invention relates to the technical field of luminescent material synthesis. The invention provides a Te-based hybrid halide luminescent material and a preparation method thereof. The luminescent material is of a zero-dimensional organic-inorganic hybrid crystal structure and comprises [TeCl6] < 2-> anions and organic phosphonium cations (C25H21PCl) < + > containing polar substituent groups. The preparation method comprises the following steps: dissolving tellurium dioxide in hydrochloric acid; continuously adding (2-chlorobenzyl) triphenyl phosphonium chloride, and reacting to generate a precipitate; centrifugally separating the precipitate, and drying under a vacuum condition to obtain intermediate powder; dissolving the powder in acetonitrile; and putting the solution into a sample bottle, putting the sample bottle into a sealed container containing diethyl ether, and carrying out solvent diffusion crystallization to obtain the luminescent material. According to the luminescent material, energy coupling and non-radiation loss between luminescent units are reduced, excitation energy can be more sufficiently converted into radiation luminescence, the luminous efficiency is improved, the luminescent material can be better matched with a blue light wave band, and the luminescent material is suitable for application scenes such as high-brightness solid-state illumination and photoelectric display.

The utility model provides a heat preservation inflatable mattress provided with silver films, the heat preservation inflatable mattress provided with the silver films comprises a mattress outer layer film, three layers of silver films and two layers of protective films are arranged in the mattress outer layer film, and a layer of protective film is arranged between two adjacent layers of silver films. According to the heat preservation inflatable mattress with the silver films, the three layers of silver films are arranged to form multiple reflection barriers, heat radiation loss is effectively blocked, the protective films serve as spacing layers, the positions of the silver films are fixed, the pressure resistance of the mattress is enhanced through the high elasticity of the protective films, and deformation after inflation is prevented. Through the alternative stacking design of the silver films and the protective films, the specific hole layout and the welding point structure, the heat reflection path is optimized, the interlayer binding force is enhanced, light weight and durability are balanced, the heat preservation performance is remarkably improved, and the service life is remarkably prolonged.

The invention relates to the technical field of wireless communication, in particular to a liquid crystal phase shifter and a liquid crystal antenna. The liquid crystal phase shifter comprises a liquid crystal box and a radio frequency substrate, the liquid crystal box comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer located between the first substrate and the second substrate, a first microstrip line and a first metal layer, the first microstrip line is located on the side, facing the second substrate, of the first substrate, the first metal layer is located on the side, facing the first substrate, of the second substrate, and the first metal layer is grounded; the radio frequency substrate comprises a third substrate and a second microstrip line located on one side of the third substrate. And the first microstrip line is electrically connected with the second microstrip line through the connecting structure. According to the invention, radiation loss and unexpected radiation can be reduced, and the accuracy and power of signal transmission can be improved.

To provide a laminate for optical waveguides that excels in reducing radiation loss, heat resistance, and low birefringence. [Solution] A laminate for optical waveguide having a core layer and a cladding layer, wherein the core layer is made of a first polyimide having structural units represented by the following general formula (1), and the cladding layer is made of a second polyimide having structural units represented by the following general formula (1), and the fluorine substitution rate of the first polyimide is f core The fluorine substitution rate of the second polyimide is set to f. clad When this is the case, the following equation: f clad >f core This is a laminate for optical waveguides that satisfies the following conditions. JPEG2026073954000035.jpg50169

The invention belongs to the technical field of optical microscopic imaging, and discloses a microscopic imaging system and a stimulated radiation loss microscope. The microscopic imaging system comprises an illumination mechanism used for providing a first light beam and a second light beam which are coaxially incident; the annular partition phase modulation element comprises a first phase modulation area and a second phase modulation area connected to the peripheral side of the first phase modulation area, the first phase modulation area is circular, and the second phase modulation area is annular; the first phase modulation area and the second phase modulation area are configured to perform phase modulation and convergence on a first light beam and a second light beam which are vertically incident respectively, so that a first light spot and a second light spot which are in one-to-one correspondence and coincide in center are formed on the focal plane of the stimulated radiation loss microscope respectively. According to the technical scheme, light energy loss caused when the microscope adopts a high-numerical-aperture illumination objective lens is improved, miniaturization of the system is facilitated, and the imaging quality is improved.

The invention provides a low-cost and high-performance hybrid integrated coaxial line directional coupler and a radio frequency module. A hybrid integration scheme of the single-layer double-sided printed circuit board and the metal cavity is adopted, so that the number and cost of assembly accessories are greatly reduced. Meanwhile, the single-layer double-sided printed circuit board is matched with the metal cavity to form an effect similar to a coaxial coupling line, radiation loss is effectively inhibited, field distribution is improved, and therefore the insertion loss, the coupling flatness and the isolation performance of the coupler are improved. Part of medium in the middle of the transmission line on the circuit board is hollowed out, phase compensation is carried out on transmission signals of the coupling line, and the excellent performance of the directional coupler in the aspects of coupling degree, return loss, insertion loss and isolation is further achieved. Under the condition of ensuring the performance of the device, the medium between the transmission line and the ground is reserved, and the physical stability of the device is improved.

An optical arrangement includes an optical printed circuit board (OPCB) having at least a first optical waveguide having a first end located on the OPCB. The optical arrangement also includes at least one photonic integrated circuit (PIC) mounted to the OPCB. The PIC includes a second optical waveguide. The first waveguide has a second end located on a portion of the second waveguide to optically couple light between the PIC and the first waveguide. The portion of the second waveguide on which the second end of the first waveguide is located has an inverse taper. The inverse tapered portion is defined by a plurality of segments. The segments of the inverse tapered portion each have a length and a taper rate that causes each segment to make an equal contribution to any radiation losses in the mode transformation of light being coupled between the first and second waveguides.

The invention discloses a terahertz pure silicon equiphase low-loss waveguide based on a bound state in a continuous spectrum, and belongs to the technical field of terahertz on-chip communication. The waveguide comprises a conical gradual change input structure, a first straight waveguide, an equiphase waveguide, a second straight waveguide and a conical gradual change output structure which are sequentially connected along a transmission direction, the equiphase waveguide is of a one-dimensional photonic crystal structure formed by arranging a plurality of periodic unit structures, each unit is a cuboid made of a high-resistance silicon material, and symmetrical elliptic cylindrical grooves are formed in the upper surface and the lower surface of each unit. Energy band degeneracy of monopole and dipole modes is realized through points in a Brillouin region, a Dirac cone is formed, a near-zero effective refractive index is obtained at a central working frequency, and equiphase transmission is realized; and meanwhile, a bound state mechanism in a continuous spectrum is utilized to greatly improve quality factors and suppress radiation loss. The waveguide supports flexible adjustment of the working frequency through geometric dimension equal-proportion scaling, covers the frequency band of 0.1-10 THz, and can be designed to be of a bent structure. According to the invention, an all-silicon process is adopted, the structure is compact, the loss is low, and the device is suitable for high-fidelity signal transmission and processing in a terahertz integrated system.

The invention discloses a square SIW (substrate integrated waveguide) cavity and strip line resonator mixed miniaturized filter, which comprises a dielectric layer, the top metal layer is located on the upper surface of the dielectric layer; the middle metal layer is located in the middle of the dielectric layer; the bottom metal layer is located on the lower surface of the dielectric layer; the metalized through hole array penetrates through the dielectric layer and is connected with the top metal layer and the bottom metal layer; the first metalized blind hole and the second metalized blind hole are used for connecting the middle metal layer and the bottom metal layer; the first metalized through hole and the second metalized through hole are connected with the top metal layer and the bottom metal layer; a feed microstrip line; the strip line resonator is embedded in the SIW cavity, the hybrid structure introduces an additional transmission zero point for the filter while reducing the size of the filter and reducing radiation loss, and the stop band frequency selection characteristic of the filter is improved.

The application discloses a high-quality-factor hybrid metal-dielectric plasmonic resonant optical filter; the filter comprises a substrate layer, a high-refractive-index dielectric layer, a low-refractive-index dielectric layer and a metal grating layer which are sequentially stacked upwards; the substrate layer is made of a low-refractive-index transparent dielectric material; the material of the high-refractive-index dielectric layer has a refractive index greater than the refractive index of the material of the low-refractive-index dielectric layer and the substrate material; the metal grating layer is provided with a grating structure with periodic arrangement and comprises three metal strips in one device period; the width of the middle metal strip is greater than the width of the two metal strips on the sides; the radiation loss of the coupling mode is adjusted by adjusting the width of the middle metal strip, and then the quality factor of the filter is adjusted. The application has the advantages of simple structure, high quality factor, compatibility with traditional integrated circuit preparation processes and the like, and has wide application in the fields of optical communication, hyperspectral and multispectral imaging and sensing and the like.

To provide a laminate for optical waveguides that excels in reducing radiation loss, heat resistance, and low birefringence. [Solution] A laminate for optical waveguide having a core layer and a cladding layer, wherein the core layer is made of a first polyimide having structural units represented by the following general formula (1), and the cladding layer is made of a second polyimide having structural units represented by the following general formula (1), and the fluorine substitution rate of the first polyimide is f core The fluorine substitution rate of the second polyimide is set to f. clad When this is the case, the following equation: f clad >f core This is a laminate for optical waveguides that satisfies the following conditions. JPEG0007849634000035.jpg50169

The invention provides a composite die and a preparation method thereof, and a composite sodium metasurface and a preparation method and application thereof, and relates to the technical field of surface plasmon materials. The polymethyl methacrylate photoetching layer is used as a mold for forming the sodium metasurface, the mold is moderate in hardness, high in structural precision and good in structural adjustability, the precision of the finally formed sodium metasurface is further improved, and the optical quality factor of the sodium metasurface is improved; a polymethyl methacrylate photoetching layer in the composite die is provided with an array formed by a plurality of groove units which are perpendicular to the direction of the polymethyl methacrylate photoetching layer and are in C2z axial symmetry, and the sodium metasurface layer prepared and formed by the composite die inhibits electric dipole scattering in radiation loss through a C2z axial symmetry structure. Meanwhile, a non-local mechanism is used for inhibiting non-radiation loss, plasmon resonance of a high optical quality factor is achieved, the optical quality factor of the obtained composite sodium metasurface reaches up to 237, and the light absorption efficiency exceeds 90%.

The invention discloses a coupler based on dielectric integrated suspended parallel strip lines and communication equipment, and relates to the technical field of microwave transmission. The coupler comprises a dielectric integrated suspended line platform, a differential coupler circuit and a defect metal ridge structure. According to the differential coupler, the defect metal ridge structure is arranged between the upper signal conduction band and the lower signal conduction band, the structure is coupled with the conduction bands to generate resonance under the excitation of a common-mode signal, so that the common-mode signal is effectively suppressed, and the overall size of the differential coupler is reduced through spatial multiplexing on the structure while the common-mode suppression function is realized. Besides, the dielectric integrated suspended line platform is provided with an electromagnetic shielding cavity, and the differential coupler circuit is suspended in an air cavity in the electromagnetic shielding cavity, so that dielectric loss and radiation loss are effectively reduced, and signal transmission efficiency is improved.

The application discloses a kind of based on ground state association's superlinear infrared confocal stimulated radiation super-resolution system and method.The application builds the up-conversion superlinear stimulated radiation loss super-resolution imaging system under the guidance of confocal, by constructing ground state association's dynamic cross relaxation energy transfer model, to accurately obtain the light loss process of the rare earth particles under the action of superlinearity, and can accurately predict the ideal excitation power under high loss efficiency.Based on the super-resolution imaging method under the guidance of the theory, by infrared confocal module, two-photon scanning module, photoelectric detection module Microscopic imaging device, simultaneously utilize the double infrared excitation response of rare earth nanoparticles, the light path precision calibration of stimulated radiation super-resolution imaging process is realized.Using rare earth doped up-conversion nanoparticles and rate equation model accurately simulates the particle number distribution of each energy state of up-conversion nanoparticles, explores the influence of cross relaxation energy transfer process in rare earth nanometer material on the formation process of high-efficiency particle number inversion.Finally, the application can realize the up-conversion stimulated radiation super-resolution imaging system of low loss, high resolution, high signal-to-noise ratio and low system calibration complexity.

The utility model belongs to the technical field of insulator core rod defect detection, and discloses an inner slotted ring patch antenna for insulator core rod defect detection, which comprises a dielectric substrate, a coplanar waveguide feed ground conductor is etched on the upper surface of the dielectric substrate, the coplanar waveguide feed ground conductor comprises an inner slotted ring patch arranged on the upper surface of the dielectric substrate, and the inner slotted ring patch is arranged on the lower surface of the dielectric substrate. The inner side edge of each inner slotted annular patch is provided with a slot, the coplanar waveguide feed ground conductor comprises a central conductor arranged on the upper surface of the dielectric substrate and rectangular ground conductors symmetrically distributed on the two sides of the central conductor, and the two rectangular ground conductors are connected with the outer edges of the two inner slotted annular patches respectively. According to the utility model, the arc-shaped coupling section extends into the inner side of the slotted ring, so that high-efficiency electromagnetic coupling is realized, and the working frequency band is widened; the rectangular ground conductor is connected with the outer edge of the inner slotted annular patch, the symmetry is improved, the radiation loss is reduced, the arrangement of the slots concentrates the surface current distribution, and the radiation stability is enhanced.

This invention discloses a COC high-frequency interconnect structure, fabrication method, and optical module, including a bottom carrier substrate; at least one optical chip disposed on the bottom carrier substrate; an upper wiring substrate stacked on the bottom carrier substrate and located to the side of the optical chip; at least one set of first bonding wires consisting of two gold wires connected in parallel, the first bonding wires being electrically connected between a signal electrode and a signal bonding pad; several second bonding wires, the second bonding wires being electrically connected between a ground electrode and a ground pad; and a side grounding metal layer disposed on the side of the upper wiring substrate. This invention, through a non-obvious stacked architecture, solves the step difference problem while synergistically introducing a three-dimensional shielding structure, fundamentally reducing the parasitic inductance of gold wire bonding and suppressing radiation loss, thereby achieving a step-wise improvement in high-frequency transmission performance.

The invention provides a slab waveguide structure, and relates to the technical field of optical waveguides, and the slab waveguide structure comprises a mobile metal layer, a first air layer, a residual magnetism material layer and a fixed metal layer which are stacked in the y direction, and the fixed metal layer comprises a first fixed metal region, a second air layer and a second fixed metal region in the x direction, the second air layer divides the slab waveguide structure into a first one-way waveguide area corresponding to the first fixed metal area, a leaky wave area corresponding to the second air layer and a second one-way waveguide area corresponding to the second fixed metal area in the x direction. The remanence characteristic of the remanence material layer ensures that light waves still achieve one-way transmission without an external magnetic field, the remanence material layer and the moving metal layer are cooperatively regulated and controlled, the thickness of the first air layer is adjusted, the key technical problems of lateral radiation deficiency, back reflection suppression, scanning range expansion, system complexity optimization and the like are solved, and meanwhile the system reliability is improved. The leaky wave efficiency is improved, the scanning precision is improved, and the strict requirements of low energy consumption and high integration are met.

A surface acoustic wave resonator with an interdigital transducer structure having an outer gap between each busbar and the interdigitated region of the interdigitated electrode fingers. An overcoat extends over the outer gap without extending into the interdigitated region. The overcoat is formed from a material that is different than that of the pair of opposing busbars and interdigitated electrode fingers.

The application relates to the field of communication, in particular to a Ku wave band second harmonic suppression filter, which comprises, from top to bottom, a filter main body, a dielectric substrate and a bottom ground copper sheet, the filter main body adopts a five-step hairpin resonator and comprises five U-shaped resonators, adjacent U-shaped resonators adopt a reverse opening layout, each U-shaped resonator is folded by 1 / 2 wavelength microstrip lines, and the arm length is 1 / 4 wave length. The application realizes the shift of a second spurious passband to high frequency and makes the suppression degree greater than or equal to 18 dB; meanwhile, period dislocation slotting is adopted, which can reduce the fundamental mode loss, weaken the spurious coupling and radiation loss, and make the slotting have little influence on the insertion loss; the application breaks through the high frequency bottleneck of the traditional technology, is suitable for a high frequency scene above 10 GHz, and simultaneously considers the high harmonic suppression, low insertion loss and engineering realizability.

The invention relates to the technical field of luminescent material synthesis. The invention provides a chiral Mn metal halide luminescent material and a preparation method thereof. The general formula of the luminescent material is Mn2Cl6 (L) 2, and L is a chiral 3-hydroxypyrrolidine cation. The preparation method comprises the following steps: S1, dissolving manganese chloride tetrahydrate in n-propyl alcohol; s2, adding chiral 3-hydroxypyrrolidine hydrochloride, and carrying out a reaction under a room temperature condition; s3, adding absolute ethyl alcohol until the solution is clear; and S4, after the solution is filtered, oil bath evaporation is carried out, and the R-(C4H10NO) 2Mn2Cl6 or S-(C4H10NO) 2Mn2Cl6 luminescent material is obtained. According to the luminescent material disclosed by the invention, a chiral coordination environment with non-central symmetry is formed by introducing chiral 3-hydroxypyrrolidine cations, and non-radiation loss caused by lattice vibration is reduced, so that stable red light emission is realized; the preparation method is low in energy consumption and stable in process, and the obtained material is excellent in optical performance consistency and can be used as a fluorescence conversion layer or a red light emission layer to be applied to special LED illumination, display and photoelectric devices.