1285 results about "Photonic crystal" patented technology

The invention discloses a switch cabinet discharge detection method and system, and relates to the technical field of power equipment state monitoring and fault diagnose.The light intensity attenuation rate and the vibration frequency are collected through a photonic crystal fiber, the concentration of decomposed gas is detected in combination with a Raman spectrum, and a space-time joint feature matrix is generated; performing space weight distribution on the space-time joint feature matrix based on the switch cabinet structure, and inputting the space weight to an RBF-SVM (Radial Basis Function-Support Vector Machine) to generate discharge type probability distribution; based on a high-frequency energy parameter and a gas decomposition concentration parameter in the spatio-temporal joint characteristic matrix, inputting the parameters into a multiple linear regression model, calculating an insulation aging index, and judging an insulation degradation grade according to a threshold value; the photonic crystal fiber is used for collecting the light intensity attenuation rate and the vibration frequency, the Raman spectrum is combined for detecting the decomposition gas concentration to generate the space-time joint characteristic matrix, synchronous monitoring of various physical and chemical parameters in the switch cabinet is achieved, and the accuracy and comprehensiveness of recognition of different types of discharge phenomena are improved.

The invention belongs to the technical field of topological photonic crystals, and discloses a topological laser resonant cavity, a design method thereof and a topological valley photonic crystal laser. According to the invention, three different photonic crystal areas are utilized to form a three-layer heterostructure, and the three different photonic crystal areas are divided into A, B and A'areas according to the same lattice period array arrangement; the area A and the area A'are the innermost layer and the outermost layer of the topological laser resonant cavity respectively, the closed topological laser resonant cavity is formed at the interface of the area A and the area A ', and the area B is embedded in the middle of the interface; the three different photonic crystal regions have different primitive cell energy band characteristics, and the energy band structure of the photonic crystal primitive cell in the region B has a linear dispersion curve and can be described by a Dirac equation; and the photonic crystal primitive cells in the A'and the A region are energy band structures with different topological valley numbers obtained by breaking the symmetry of the photonic crystal primitive cells in the B region. According to the invention, the performance of the topological valley photonic crystal laser can be enhanced.

The invention discloses a method for realizing topological boundary state switching by using a gyromagnetic photonic crystal. The method comprises the following steps: (1) obtaining a gyromagnetic photonic crystal formed by arranging cylindrical gyromagnetic columns, adjusting the radius of the gyromagnetic columns and an applied external magnetic field to obtain inversion of Mie resonance, realizing topological phase change, and obtaining three different topological phases; (2) on the basis of the three different topological phases obtained in the step (1), two gyromagnetic photonic crystals with different topological characteristics are spliced to obtain a heterogeneous photonic structure, and a one-way transmission chiral boundary state exists at a heterogeneous interface; and (3) for the heterogeneous photon structure, multiple Mie resonance inversion is adjusted through a magnetic field regulation and control method, and switching control of a topological boundary state is realized. According to the invention, a switchable topology boundary state is realized in the gyromagnetic photonic crystal, and a new idea and guiding significance are provided for design and application of a topology photonic device.

The invention discloses a virtual power plant terminal-oriented encryption transmission and self-healing control cooperative system, which comprises a dynamic encryption module, a hierarchical encryption system is constructed on the basis of a quantum chaos sequence and a national secret SM9 algorithm, a dynamic session key is generated in real time through an edge node, and terminal power data is subjected to hierarchical encryption; the self-healing control module integrates a block chain distributed account book and a deep reinforcement learning model, constructs a health degree portrait of the terminal equipment in real time, monitors a link state through a topology sensing algorithm, predicts a fault propagation path, and triggers communication link reconstruction and computing resource elastic scheduling for self-healing; the collaborative optimization module constructs an optimization objective function, balances encryption strength and self-healing efficiency, adopts a quantum topology photonic crystal optimization algorithm to determine a weight coefficient in the optimization objective function, and realizes global optimal matching of an encryption-self-healing strategy; and the edge computing node performs terminal-edge cloud cooperative training according to the global optimal matching strategy of the encryption-self-healing strategy.

The invention is applicable to the technical field of porous materials, and relates to multistage ordered macroporous-mesoporous titanium dioxide and a preparation method and application thereof, and the preparation method comprises the following steps: (1) preparing a superstructure photonic crystal solid; (2) forming a light yellow solution with the concentration of 0.2-0.5 mol / L; and (3) adding the superstructure photonic crystal solid in the step (1) into the light yellow solution in the step (2) to prepare the multistage ordered macroporous-mesoporous titanium dioxide. The preparation method has the beneficial effects that in the preparation method of the multistage ordered macroporous-mesoporous titanium dioxide disclosed by the invention, the stability of a mesoporous superstructure unit can be ensured, and accurate and perfect copying of a pore channel structure can be realized; the separation efficiency of photo-generated charges and photo-generated holes of the titanium dioxide disclosed by the invention in photocatalytic water decomposition is greatly improved, and due to the multi-stage ordered macroporous-mesoporous structure, multiple scattering of incident light in a porous frame can be ensured, so that the efficiency of hydrogen production by photocatalytic water decomposition is improved.

A phononic crystal generative design method based on a diffusion model and an unstructured polygonal mesh belongs to the field of phononic crystal design, and comprises the following steps: firstly, generating phononic crystal unit cells, calculating a dispersion curve of the phononic crystal unit cells, and constructing a data set; secondly, constructing a diffusion model and designing a neural network to learn a reverse process of the diffusion model; inputting the training data into the neural network for training until a termination condition is met; and finally, extracting a dispersion curve from the test data set as a reverse design target, quickly generating a group of photonic crystals by using a neural network and a diffusion model sampling algorithm, calculating the dispersion curve corresponding to the generated photonic crystals, and calculating an error between the dispersion curve and the reverse design target. According to the method, the dependence of an existing generative design method on a rule design domain can be broken through, and the adaptability to irregular geometrical shapes and complex boundaries is improved; efficient learning of the complex mapping relation between the mechanical attributes and the geometric configuration is achieved; the method has the advantages of high design speed and high precision.

The invention relates to the technical field of surface acoustic wave devices, and discloses a lithium tantalate single crystal film-based Loff wave photonic crystal resonator, which comprises a functional substrate and a piezoelectric film layer on the upper surface of the functional substrate, an interdigital transducer is arranged in the middle area of the upper surface of the piezoelectric film layer, and photonic crystals are arranged on the two sides of the interdigital transducer; the piezoelectric thin film layer is a lithium tantalate single crystal thin film, and the tangential direction of the lithium tantalate single crystal thin film is any one of Y cuts, including 0-degree Y, 36-degree Y, 42-degree Y, 50-degree Y, 64-degree Y and 128-degree Y cuts. The photonic crystal is used for replacing a reflecting grating in a traditional surface acoustic wave resonator, higher sound velocity and lower longitudinal loss are achieved through a material system constructed by combining the functional substrate and the lithium tantalate single crystal film, and the photonic crystal resonator has the advantages of being simple in structure, small in size and easy to prepare and integrate. And compared with a Bragg reflection grating resonator with the same size, the resonator has a higher Q value.

The invention provides a patterned photonic crystal laser and a preparation method thereof, the laser comprises a substrate, and a first mask layer, a photonic crystal layer and a second mask layer which are sequentially deposited on the substrate, a light emitting area is etched in the central area of the second mask layer, and transparent conductive layers are deposited on the surface of the second mask layer and the light emitting area; a p-annular electrode is arranged on the surface of the transparent conductive layer on the second mask layer, and an n-annular electrode is arranged below the substrate; the photonic crystal layer is composed of a nanorod array and a polymer filled in gaps of nanorods; holes distributed in a patterned array are etched in the surface of the first mask layer, and nanorods are epitaxially grown in hole areas; the nanorod is formed by sequentially depositing a substrate contact layer, a first waveguide layer, a multi-quantum well layer, a second waveguide layer, a coating layer and a component gradient layer. According to the invention, through collaborative design optimization of all the layers, emission of laser with specific wavelength and preparation of a laser emitting laser with single longitudinal mode, narrow linewidth and stable wavelength are realized.

The invention provides a pneumatic grinding end effector with a spindle vibration isolation function and a control method, the pneumatic grinding end effector comprises a supporting assembly, the supporting assembly comprises an upper bottom plate and a lower bottom plate, a connecting flange is mounted on the upper bottom plate, and the connecting flange is used for being connected with a robot; the propelling assembly is connected with the upper bottom plate and the lower bottom plate, and the propelling assembly is used for adjusting the distance between the upper bottom plate and the lower bottom plate; the grinding assembly comprises a pneumatic motor and a grinding tool, and the pneumatic motor is installed on the lower bottom plate and used for driving the grinding tool; and the vibration isolation assembly comprises a vibration isolation frame and a plurality of photonic crystal unit cells installed on the vibration isolation frame, the vibration isolation frame is connected with an output shaft of the pneumatic motor and the grinding tool, and the multiple photonic crystal unit cells are arranged around the peripheral side of the vibration isolation frame. According to the pneumatic grinding end effector, the influence of vibration of the main shaft on the grinding quality in the grinding process of the end effector is effectively solved.

The invention provides a topological polygonal laser. According to the device, a topological non-trivial domain formed by two-dimensional gyromagnetic photonic crystals is combined with a trivial domain, and an out-of-plane magnetic field externally applied to a sublattice A is started to open an energy band gap, so that a multi-position angular state is realized. The two-dimensional gyromagnetic photonic crystal opens or closes an out-of-plane magnetic field externally applied to the sub-lattice A so as to realize opening and closing of the angular state of the topological angular state laser. The topological multi-angular-state laser is realized by taking the two-dimensional gyromagnetic photonic crystal as a platform, and the topological multi-angular-state laser has the advantages that switching of angular states can be realized without changing the structure, and the laser is topologically protected and has topological robustness.

The invention relates to the technical field of chip preparation, and provides a chip based on an annular photonic crystal and a preparation method thereof. The preparation method comprises the following steps: growing a nucleating layer on a substrate; growing a superlattice structure on one side, away from the substrate, of the nucleating layer; sequentially growing an n-type coating layer, an n-type waveguide layer, a quantum well and a p-type electron blocking layer on one side, deviating from the nucleating layer, of the superlattice structure; etching a plurality of annular cavities on the p-type electron barrier layer to form an annular photonic crystal; growing a p-type extension contact layer on one side, deviating from the quantum well, of the p-type electron blocking layer; and carrying out in-situ annealing treatment. According to the preparation method, the directivity of the photonic band gap can be effectively adjusted, uniform light waves in all directions on the side face can be formed, so that leakage of laser from a non-light-emitting area on the side face is restrained, the light emitting efficiency is improved, the annular photonic crystals are periodically distributed, and the light beam quality is effectively guaranteed.

The invention relates to the technical field of laser preparation, and provides a photonic crystal surface emitting laser and a preparation method thereof. The preparation method comprises the following steps: sequentially growing an n-type doped layer, a p-type independent limiting layer and a p + / n + tunnel junction on a GaAs substrate; preparing a patterned mask structure on the p + / n + tunnel junction; the patterned mask structure comprises a plurality of preset patterns; etching the p + / n + tunnel junction according to a preset pattern to obtain a plurality of photonic crystals; sequentially growing an n-type coating layer, an undoped active layer and a p-type coating layer on the photonic crystal; growing a p-type electrode on the p-type coating layer; and growing an n-type electrode on the GaAs substrate. According to the preparation method, the SHB problem can be effectively solved, the multiple photonic crystals can be arranged in different modes to form a pattern capable of achieving the needed light emitting mode, light emitting in all directions can be achieved, the requirements for different light emitting characteristics of the photonic crystal surface emitting laser are met, and the use performance of the laser is guaranteed.

A system for wavelength-accurate conversion includes a light source configured to pump a first color laser light and a device configured for Kerr-nonlinear wavelength conversion of the first color laser light to a signal laser light and an idler laser light, the device includes: a waveguide configured to couple to the light source; and a microring resonator coupled to the light source via the waveguide. The microring resonator configured to generate the signal laser light and the idler laser light. The microring resonator including a plurality of projections. A number of the projections is linked to a targeted output wavelength for at least one of the signal laser light or the idler laser light, and a refractive index grating strength of each projection of the plurality of projections is linked to a frequency mismatch between modes when comparing to a reference device lacking the plurality of projections.

A surface-emitting laser element includes a translucent substrate, a back surface of which is light emission surface, an air-hole layer that is a photonic crystal layer, and a light reflection layer including a reflection surface. The air-hole layer has a diffraction surface which has a weakening region where a separation distance between the diffraction surface and the reflection surface is provided such that a light intensity of interference light generated by interference of first diffracted light and second diffracted light is lower than a light intensity of the first diffracted light is provided, and a strengthening region where a separation distance between the diffraction surface and the reflection surface is provided such that the light intensity of the interference light is higher than the light intensity of the first diffracted light is provided.

The invention relates to a topological photonic crystal-based optical filter design method, equipment and medium, and the method comprises the steps: constructing a periodically arranged photonic crystal flat plate, and enabling a super unit to be composed of a topological non-trivial unit and a topological trivial unit, and the topological characteristic and the arrangement mode of the topological non-trivial unit are determined by calculating the two-dimensional bundling phase so as to form a topological defect state. And then, by adjusting the width of the air micropores and the defect spacing, the flatness and the coupling strength of a defect state energy band are optimized, and the stability of the resonant wavelength is ensured. Full-wave electromagnetic simulation is adopted to test transmission spectrums under different incident angles, the angle insensitivity characteristic of resonant wavelength is verified, and key structure parameters are iteratively optimized. Finally, an optical filter with efficient filtering, low energy consumption, high integration level and anti-interference capability is output, and the optical filter is widely applied to the fields of optical communication, optical sensing, high-precision spectral analysis and the like.

The invention relates to the technical field of building thermal insulation materials, in particular to a preparation method of a building thermal insulation material based on modified aerogel, solves the defects in the prior art, and comprises the following components in parts by weight: 30-50 parts of modified aerogel, 5-15 parts of photonic crystals, 2-8 parts of carbon nanotubes, 10-20 parts of phase change energy storage microspheres and 1-5 parts of photothermal conversion nanoparticles. The preparation method comprises the following steps of: carefully selecting and combining various functional components, such as modified aerogel, carbon nanotubes, phase change energy storage microspheres, photothermal conversion nanoparticles and the like, so as to prepare the thermal-insulation coating with the thermal-insulation function, thereby obtaining the thermal-insulation coating with the thermal-insulation function, the thermal-insulation function, the thermal-insulation function, the thermal-insulation function and the thermal-insulation function. According to the building heat insulation material technology based on the modified aerogel, through innovative material compounding and multifunctional integration, the heat insulation performance is greatly improved, multiple advantages of environmental protection, safety, multiple functions and the like are brought, and a new solution is provided for the field of building energy conservation.

The invention belongs to the technical field of optical fiber sensing, and particularly relates to a photonic crystal optical fiber sensor which is characterized in that a cladding material is silicon dioxide, a to-be-detected solution channel is formed in the cladding of an optical fiber, and a first inner-layer air hole and a second inner-layer air hole are formed outside the to-be-detected solution channel; the inner wall of the second inner layer air hole in the X-axis positive half axis direction is plated with a silver film, a plurality of outer layer air holes are formed in the outer portion of the second inner layer air hole, every two outer layer air holes form a group, and each group of air holes are evenly distributed in the circumferential direction. The aperture of the outer-layer air holes is larger than that of the first inner-layer air holes and that of the second inner-layer air holes; the number of the first inner layer air holes is 16, and the diameter of the first inner layer air holes is 1.5 mm; the number of the second inner layer air holes is 24, and the diameter of the second inner layer air holes is 1.5 mm. The number of the outer layer air holes is 16, and the diameter of the outer layer air holes is 2.5 mm. The diameter of the to-be-detected solution channel is 7.3 mm; and the thickness of the silver film is 40nm.

The invention provides a semiconductor photonic crystal light-emitting structure and a preparation method thereof. The semiconductor photonic crystal light-emitting structure comprises a semiconductor substrate layer; the active layer is positioned on one side of the semiconductor substrate layer; the photonic crystal layer is located on the side, away from the semiconductor substrate layer, of the active layer and comprises a first semiconductor layer, a second semiconductor layer and a protection layer, and a groove is formed in the first semiconductor layer; the groove extends into the first semiconductor layer from the surface of the side, away from the active layer, of the first semiconductor layer, and the protection layer is located on the surface of the inner wall of the groove. The second semiconductor layer is located on the surface of the side, away from the active layer, of the first semiconductor layer between the adjacent grooves and does not extend into the grooves. The light field mode regulation and control capability of the semiconductor photonic crystal light-emitting structure is improved.

A light emitting device is described. The light emitting device includes a single light emitting photonic crystal having an electroluminescent material disposed in the single light emitting photonic crystal. The single light emitting photonic crystal includes a series of layers of chiral liquid crystalline polymer. The electroluminescent material is localized in one of the layers of chiral liquid crystalline polymer. At least one of the series of layers of chiral liquid crystalline polymer includes a chiral liquid crystalline, charge carrier transporting polymer. The single light emitting photonic crystal further includes a second luminescent material, where energy emanating from the electroluminescent material stimulates the second luminescent material into light emission, and the light emitted by the light emitting device is a mixture of light emitted by the electroluminescent material and light emitted by the second luminescent material.

A method of producing a photonic crystal fiber (PCF) preform, the method including measuring a wall thickness of each of a plurality of preform capillaries along at least a portion of its periphery at one or more axial positions; selecting a number of preform capillaries from the plurality of preform capillaries at least based on a thickness criterion; and placing the selected preform capillaries in a tube to form a PCF preform having at least one ring arrangement including the selected preform capillaries, wherein the selected preform capillaries are oriented such that the portion of each of the selected preform capillaries, within which the measured wall thickness varies from a nominal wall thickness by no more than a maximum thickness variation, faces a longitudinal axis of the tube, the tube being substantially symmetrical about the longitudinal axis.

The invention discloses a vernier effect and Sagnac ring-based dual-parameter optical fiber sensor, which belongs to the technical field of optical fiber sensors and comprises a broadband light source SLED (1), a coupler (2), a sensing structure A (3), a circulator (4), a sensing structure B (5) and a spectrum analyzer (6). The device comprises a first single-mode fiber (301), a polarization-maintaining photonic crystal fiber (302), a few-mode fiber (303), a fiber Bragg grating (304), a second single-mode fiber (501), a first hollow-core fiber (502) and a second hollow-core fiber (503). Parasitic interference is avoided by grinding the end face of the hollow-core optical fiber, and the reliability of the sensor is improved; two transmission peaks appear on the fiber bragg grating inscribed on the few-mode fiber through different mode numbers in the few-mode fiber, and gas concentration and temperature sensitivity of two signals can be calculated by observing drifting of the transmission peaks; an optical vernier effect can be formed through superposition of a Sagnac interferometer formed by polarization-maintaining photonic crystal fibers and an F-P interferometer formed by hollow core dislocation, and the gas concentration and the temperature sensitivity of the sensor are improved. The sensor has the characteristics of high sensitivity, wide measurement range, simple structure, small size and the like.

The invention discloses a multilayer film compatible with H, K, medium-wave infrared and long-wave infrared band stealth and radiation heat dissipation. Comprising a substrate, a metal reflection layer, a photonic crystal layer fused with a loss medium and an H and K wave band antireflection layer, the absorption rate of H and K wave bands is larger than 0.5, the emissivity of medium wave infrared and long wave infrared bands is lower than 0.5, and the emissivity of very long wave infrared bands is larger than 0.5; the photonic crystal layer fused with the loss medium is of a multi-layer structure and is formed by alternately stacking dielectric layers made of various high-refractive-index dielectric materials and dielectric layers made of various low-refractive-index dielectric materials. The multilayer film provided by the invention has effective radiation heat dissipation and heat management capabilities while realizing stealth on solar radiation and heat radiation, and can be widely applied to the fields of aviation, aerospace and the like.

The invention relates to the technical field of semiconductors, and discloses a photonic crystal edge-emitting laser and a preparation method thereof, and the preparation method comprises the steps: providing a laser substrate which sequentially comprises a substrate, an N-type coating layer, an N-type waveguide layer, an active layer, a P-type waveguide layer, a P-type coating layer and a P-type cover layer from bottom to top; the laser base body comprises a rectangular third target area, second target areas at the two ends of the length direction of the third target area and first target areas located on the side portions of the third target area and the second target areas in the vertical direction; forming an ion implantation region in the first target region; photonic crystals are formed in the first target area and the second target area; the first target area forms a mode filtering area, the second target area forms a current limiting area, and the third target area forms a current injection area. Compared with the prior art, the heat dissipation characteristic of the laser in the transverse direction can be enhanced, the electrical performance and reliability of the laser are improved, and meanwhile the technological process is simplified.

The invention discloses an energy-saving driving device based on automatic control, which comprises a support frame, a conveying mechanism is mounted at the upper end of the support frame, a transmission belt is mounted on the conveying mechanism, a plurality of photonic crystal pressure sensors are arranged on the transmission belt at equal intervals, and a driving motor body is mounted at one end of the conveying mechanism. A protective shell is installed on the outer side of the driving motor body, a stator shell is installed in the protective shell, a plurality of stator grooves are formed in the circumferential side wall in the stator shell at equal intervals, and heat storage layers are installed in the stator grooves. The static heat insulation limitation of a traditional vacuum heat insulation plate is broken through, the shell of the driving device has the efficient heat insulation and active heat dissipation capacity, in addition, the maintainability is greatly reduced through the self-repairing design, the use convenience is improved, light intensity change is used for detecting goods distribution, linkage adjustment of the rotating speed of the transmission roller is achieved, and idling energy consumption is reduced; the paraffin and graphene composite phase change material can fully meet the low-temperature conveying requirement, and the service life is prolonged.

The invention discloses shell-imitated mechanically-enhanced photonic crystal paper, a preparation method thereof and application of the shell-imitated mechanically-enhanced photonic crystal paper in repeatable printing. The photonic crystal paper is prepared from a zirconium phosphate layered material and soft gel through blade coating shear force induced self-assembly alternate arrangement. The photonic crystal paper disclosed by the invention has a shell-imitated brick mud structure, and meanwhile, zirconium phosphate and soft gel have a strong hydrogen-bond interaction, so that the photonic crystal paper has high tensile strength, high flexibility, high modulus and self-supporting property, and can support repeated printing. When an aqueous solution containing a hygroscopic solute is used as ink to carry out ink-jet printing on the photonic crystal paper, the gel matrix is swelled, the lattice spacing is increased, and a lasting multi-color printing effect is achieved. The selected zirconium phosphate layered material has good thermal stability, and meanwhile, the brick mud structure can reduce the oxygen transmittance, so that the photonic crystal paper has flame retardant property, and the storage safety is improved. The blade coating method is simple and rapid, so that continuous production of the photonic crystal paper can be realized.

The invention provides a VO2 thermally induced phase change material-based dual-band intelligent window, a film and a preparation method thereof, and the dual-band intelligent window sequentially comprises X-coated VO2 core-shell particles, a visible light-to-infrared light transparent substrate and a visible light-to-infrared light reflection substrate from top to bottom; the X-coated VO2 core-shell particles are core-shell structure particle materials with visible light to infrared light transparent cores X inside and VO2-doped shell layers outside, and the X-coated VO2 core-shell particles are laid on a visible light to infrared light transparent substrate. The X-coated VO2 core-shell particles and the visible light-to-infrared light transparent substrate form a photonic crystal film, and the photonic crystal film is provided with a detachable visible light-to-infrared light reflection substrate. Compared with the prior art, the method has the advantages that (1) the sunlight modulation capability of a traditional VO2 intelligent window is improved; (2) the sunlight and infrared dual-band adjustable intelligent window is obtained; and (3) intelligent window devices with different phase change temperatures can be obtained so as to adapt to energy-saving regulation and control requirements of buildings in different regions.

A photonic crystal optical filter and a spectrum detection system, the photonic crystal optical filter comprising: a photonic crystal portion comprising a plurality of photonic crystal units, each photonic crystal unit comprising a plurality of through holes arranged in an array, each photonic crystal unit comprising a central region and a peripheral region, the plurality of through holes comprise a first through hole in the central area and a second through hole in the peripheral area; the central area comprises Na * Na first through holes, and Na is a positive integer greater than or equal to 5; the number of the second through holes in each edge of the peripheral area is Na * Nb, wherein Nb is a positive integer greater than or equal to 1; the minimum distance between every two adjacent first through holes is a first distance Da, the minimum distance between every two adjacent second through holes is a second distance Db, the minimum distance between the first through holes and the second through holes is a third distance Dg, Na * Da + Nb * Db + Dg is smaller than or equal to 10 micrometers, and the spectrum detection system has the advantages of being high in detection precision, small in structural size, stable in structure and the like.

The utility model provides a local resonance type phononic crystal primitive cell which comprises a silicon rubber base body serving as an outer ring, a steel scatterer is arranged in an inner cavity of the silicon rubber base body, and the steel scatterer and the silicon rubber base body are connected and fixed through a soft material wrapping layer. The four spring mass subsystems are nested in the steel scattering body; a soft material wrapping layer is arranged on the side wall of the inner cavity of the silicone rubber base body. According to the utility model, a plurality of complete and directional band gaps in a low-frequency range can be effectively formed, and low-frequency elastic waves are effectively inhibited; the hollow and height difference design is adopted among the external silicon rubber base body, the steel scatterer and the spring mass subsystem, so that the vibration damping material has a sufficient deformation space to play a vibration damping role; the steel scatterer, the spring mass subsystem and other structures ensure that the anti-vibration pad has an enough supporting effect, band gap regulation and control of the local resonance type photonic crystal can be effectively achieved through material selection flexibility, and low-frequency vibration control of different frequency bands is achieved.

The embodiment of the application provides an optical amplifier, an optical assembly, an optical module, an optical communication network system and a detection device, relates to the technical field of semiconductors, and is used for solving the problem of one-way light emission of the optical amplifier. The optical amplifier comprises a waveguide and a photonic crystal. The waveguide comprises a core region and a cladding region arranged at the periphery of the core region. The waveguide further comprises an incident light side, a first light emission side and a second light emission side. The photonic crystal is arranged in the cladding region of the waveguide. The core region is located between the incident light side and the first light emission side, and the photonic crystal is located between the second light emission side and the core region. The photonic crystal is used for receiving incident light from the incident light side and emitting first emitted light and second emitted light. The first emitted light is emitted from the first light emission side, and the second emitted light is emitted from the second light emission side.

The invention discloses an on-chip plasma scattering microscope based on a one-dimensional photonic crystal, which belongs to the field of imaging and detection of surface waves on small-particle weak signals and comprises an image plane detector, an imaging tube lens, an air objective lens, a gold film, the one-dimensional photonic crystal, a scattering layer and an LED light source. And refractive index matching oil is dripped between the gold film and the one-dimensional photonic crystal and between the photonic crystal and the scattering layer for adhesion. After light beams emitted by the LED light source pass through the scattering layer, the light beams are scattered to various angles, the light beams are filtered and screened by the one-dimensional photonic crystal in a momentum space, surface plasmon polaritons of a gold film and an air interface can be excited in all directions, nanoscale particles placed on the gold film are illuminated, and scattered light of the particles is collected by the air objective lens placed above. According to the invention, the interaction between light and nano particles is greatly improved, the scattering signal intensity of the particles is increased, the imaging quality is improved, and the nano particles with very small scattering signals can be imaged and detected.