94 results about "Plasmon" patented technology

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The present disclosure relates to the technical field of communications, and provides a leaky-wave antenna and an antenna system. The leaky-wave antenna comprises: a first dielectric substrate, a first metal layer, a dielectric functional layer, a second metal layer, and a second dielectric substrate. The first metal layer comprises a first transmission line and first radiation units; multiple first notches distributed at intervals are provided on a side edge, parallel to a length direction, on a first plasmon section of the first transmission line; and the multiple first radiation units and the first notches are located on the same side of the first transmission line. In the embodiments of the present disclosure, on the basis of the first plasmon section comprised in the first transmission line, the confinement capability of electromagnetic signals can be enhanced, and the radiation of the electromagnetic signals can be reduced, thereby ensuring the transmission efficiency of the electromagnetic signals, and achieving compact design of leaky-wave antennas. In addition, by radiating antenna signals outward from the first radiation units, high gain of the antenna signals can be ensured while maintaining high transmission efficiency in the first transmission line.

The invention discloses a band-pass filter based on an artificial surface plasmon polariton structure and a design method thereof, a metal structure of the band-pass filter comprises an polariton structure region, the polariton structure region is provided with a plurality of plasmon polariton grooves, and the plurality of plasmon polariton grooves are arranged at intervals along a first direction; the depth direction of the plasmon polariton grooves is perpendicular to the first direction, the lengths and the widths of the plasmon polariton grooves are the same, and the multiple plasmon polariton grooves are formed in the same side of the polariton structure; the split resonant rings are arranged on the dielectric substrate, and the multiple split resonant rings are arranged close to the metal structure. Due to the fact that the multiple plasmon polariton grooves formed in the polariton structure and arranged at intervals in the first direction can form the artificial surface plasmon polariton structure, the band-pass filter based on the artificial surface plasmon polariton structure has the high inhibition capacity for harmonic waves of the band-pass frequency, and the band-pass filter based on the artificial surface plasmon polariton structure has the good inhibition capacity for the harmonic waves of the band-pass frequency.

The application provides a method for widening the effective bandwidth of a wave-absorbing material, and comprises a preparation method of a composite material: mixing magnetic metal hydrotalcite and expanded graphite into a multiphase fluid, then introducing the multiphase fluid into a high-speed shearing microcavity in a circulation mode, using the high-speed fluid boundary layer shearing force to realize the interlayer peeling of the magnetic metal hydrotalcite and the expanded graphite, and self-assembling into a two-dimensional / two-dimensional stacked sheet-shaped magnetic particle / few-layer graphite electromagnetic wave absorbing powder. The application proposes a two-dimensional / two-dimensional structure formed by sheet-shaped magnetic nanoparticles and few-layer graphite for a carbon-based magnetic particle composite material. The two-dimensional electron gas is easy to form at the interface, and the resonance loss different from the interface relaxation can be realized by the resonance of the plasmon and the incident microwave. On the other hand, the magnetic performance of the sheet-shaped magnetic nanoparticles can be secondarily regulated, the mode of Aharoni exchange resonance is changed, the dielectric loss and the magnetic loss are improved in an integrated manner, and the effective bandwidth of the material for absorbing electromagnetic waves is widened.

The utility model discloses a composite multimode waveguide structure, which belongs to the technical field of optoelectronic devices and comprises a plasmon unit made of a metal material or a material with a negative real part dielectric function. The plasmon unit is structurally characterized by comprising nanoparticles, nanowires, nanopore arrays or gradient structures; the dielectric waveguide is made of a semiconductor material with a high refractive index, and the dielectric waveguide is designed to be one of a strip-shaped waveguide, a ridge-shaped waveguide or a slit waveguide; and the substrate layer is located below the plasmon unit and the dielectric waveguide and comprises at least one low-refractive-index supporting layer, and the material system of the low-refractive-index supporting layer is one of an oxide material, a nitride material, a fluoride material or a composite substrate structure. According to the scheme, the contradiction of a plasma device and silicon photonics among mode degree of freedom, loss and process compatibility is solved.

This invention provides an artificial surface plasmon full-space beam scanning leaky antenna, comprising a dielectric substrate. The upper and lower surfaces of the dielectric substrate form a top layer and a bottom layer, respectively. The top layer of the dielectric substrate has a balun structure, an artificial surface plasmon strip group, and several metal stubs. Balun structures are symmetrically arranged at both ends of the artificial surface plasmon strip group. Several metal stubs are periodically arranged and symmetrically arranged on the upper and lower sides of the artificial surface plasmon strip group. The artificial surface plasmon strip group includes a pair of slidingly symmetrical artificial surface plasmon strips. This invention enables continuous scanning of the main beam from back-firing to front-firing, possessing full-space beam scanning capability. It has advantages such as small bandwidth occupation, high radiation efficiency, high directivity, high gain, low profile, and relatively small overall size, and can be applied in wireless communication fields such as automotive radar.

To solve the problem of the related art in which it was not easy to visually detect a target gene, and make it possible to detect the target gene with excellent sensitivity and specificity in a short period of time.SOLUTION: The present invention relates to a plasmon-based target gene detection method. The present invention involves performing an RT-PCR reaction using plasmonic nanoparticles, then adding SYBR Green I and 3,3',5,5'-tetramethylbenzidine, and visually detecting the presence of a target gene by irradiation with an LED.SELECTED DRAWING: Figure 1

The invention provides a visible light transparent-mid-infrared low-emissivity composite material and a preparation method thereof. The visible light transparent-mid-infrared low-emissivity composite material sequentially comprises a base layer, an anti-rust paint layer, a first transparent resin layer, a plasmon nano functional filler layer and a second transparent resin layer from inside to outside, the light transmittance of the composite material at the wave band of 400-700 nm is greater than 80%, and the infrared emissivity at the wave band of 8-14 [mu] m is less than 0.55. The light transmittance of the composite material in the wave band of 400-700 nm is larger than 80%, the infrared emissivity of the composite material in the wave band of 8-14 microns is smaller than 0.55, and high visible light transparency and low intermediate infrared emissivity of the material can be both considered; and a transparent material system can be effectively introduced on the premise that the structural stability and the process feasibility of the plasmon nano functional material are ensured, so that the synergistic compatibility between the plasmon nano functional material and the transparent material system is realized.

The invention discloses an artificial surface plasmon transmission line structure for realizing ultra-wideband crosstalk suppression. An interdigital structure is introduced into the design of a transmission line, so that the dispersion characteristic of electromagnetic waves is effectively regulated and controlled, and the coupling effect of adjacent channels is inhibited. The transmission line structure comprises an artificial surface plasmon transmission line, a matching transition structure and a microstrip line. The microstrip line is arranged at the tail end of the transmission line and is connected with the artificial surface plasmon transmission line through a matching transition structure, the artificial surface plasmon transmission line comprises a plurality of cascaded artificial surface plasmon units, and part of the artificial surface plasmon units adopt interdigital structures. According to the transmission line, while the compact structure and the simple design are kept, the excellent performance of low crosstalk, miniaturization and broadband is realized, and the stability of high-frequency signal transmission and the system integration efficiency are effectively improved.

The invention discloses a high-sensitivity photonic crystal fiber double-parameter sensor based on SPR effect, which comprises a substrate, a fiber core and a cladding are arranged on the substrate, two sides of the cladding are symmetrically and laterally polished to respectively form an upper polishing surface and a lower polishing surface, a plasmon material layer and a titanium dioxide layer are sequentially arranged on the upper polishing surface, and a high-sensitivity photonic crystal fiber is arranged on the lower polishing surface. A silver film layer is arranged on the lower polishing surface; a core air hole is formed in the center of the substrate, and outer-layer air holes which are arranged in a hexagonal structure by taking the core air hole as the center, middle-layer air holes which are arranged in a hexagonal structure by taking the core air hole as the center and inner-layer air holes which are arranged in a straight line are sequentially formed in the cladding outside the core air hole from outside to inside. According to the sensor disclosed by the invention, the air holes are specially arranged, so that the refractive index and the temperature can be synchronously detected, and the sensor has relatively high maximum wavelength sensitivity and quality factor.

The invention discloses a steep transition type artificial surface plasmon low-pass filter based on a spur line structure, and belongs to the technical field of low-pass filters, the steep transition type artificial surface plasmon low-pass filter comprises a dielectric substrate, a coplanar waveguide is arranged on the upper surface of the dielectric substrate, and a spur line unit array is arranged on the lower surface of the dielectric substrate; the coplanar waveguide comprises a center conductor belt and grounding belts symmetrically distributed on the two sides of the center conductor belt, L-shaped groove unit arrays are etched on the grounding belts, the L-shaped groove unit arrays are distributed in the length direction of the coplanar waveguide, and each L-shaped groove unit array comprises a filtering unit and transition units symmetrically arranged at the two ends of the filtering unit. The spur line unit array is aligned with the center of the filtering unit on a projection plane perpendicular to the wave propagation direction. According to the steep transition type artificial surface plasmon low-pass filter based on the spur line structure, adjustable dispersion cut-off frequency and sharp transition from a pass band to a stop band are achieved, and meanwhile the structure is simple and miniaturized.

This application provides a long-wave infrared light absorber based on phase change materials and MIM structures, belonging to the field of integrated photonic devices. The absorber includes a reflective layer, a double dielectric layer, and a metasurface layer. The metasurface layer allows light waves to enter the double dielectric layer through diffraction. The reflective layer and the metasurface layer form two reflective surfaces, allowing the light waves to undergo multiple reflections and achieve FP-cavity resonance. When the metasurface layer is crystalline and the polarization state of the light wave is not parallel to that of the metasurface layer, both the reflective layer and the metasurface layer possess metallic properties, enabling plasmon resonance when the frequency of the incident light wave matches the collective oscillation frequency of free electrons in the metal. Both FP-cavity resonance and plasmon resonance lead to the localization and enhancement of the electromagnetic field within the double dielectric layer, thereby enhancing the absorption of light waves. This application achieves reversible switching between two light wave absorption states by changing the phase state of the phase change material.

The invention relates to the field of optical sensing, in particular to a composite structure SERS detection substrate and a preparation method thereof.The composite structure SERS detection substrate comprises a GaN distributed Bragg reflector structure, a first metal layer and a second metal layer, the first metal layer and the second metal layer are deposited on the GaN distributed Bragg reflector structure, and monodisperse metal particles of the first metal layer are selected from Au, Ag or Cu; the monodisperse metal particles of the second metal layer are selected from Pt or Pb. Based on the plasmon resonance characteristic of a small-size multi-metal structure and the high reflection characteristic of a distributed Bragg reflector, the high-sensitivity optical detection of organic molecules is realized by utilizing the organic molecule fingerprint characteristic of a Raman spectrum, and meanwhile, the plasmon catalytic effect of the multi-metal composite structure is modulated by utilizing the multi-metal composite structure, so that the high-sensitivity optical detection of the organic molecules is realized. The optical sensing device is a novel optical sensing device with a wide application prospect.

The invention provides a leaky-wave antenna unit and an antenna device, and belongs to the technical field of antennae, and the leaky-wave antenna unit comprises a dielectric substrate which comprises a first side and a second side opposite to the first side; the artificial surface plasmon polariton (SSPP) structure comprises a transmission line located on the first side and a metal layer located on the second side, the metal layer is configured to be grounded, and the transmission line is configured to be connected with a feed part; wherein the transmission line is provided with a plurality of holes arranged periodically, the metal layer is provided with at least one defect groove penetrating through the metal layer, and the orthographic projection of the defect groove on the dielectric substrate is overlapped with the orthographic projection of the holes on the dielectric substrate.

The present embodiments relate to a heat-assisted magnetic recording (HAMR) write head with a NFT bi-layer structure with a bottom taper, which can be applied to one or both layers of the two layers. A heat-assisted magnetic recording (HAMR) write head can include a main pole including a tip portion configured to interact with a magnetic recording medium at an air-bearing surface (ABS). The HAMR write head can further include a near-field transducer (NFT) that includes a dielectric waveguide, a plasmon generator (PG) layer, and a second layer. The second layer can include a thermo-mechanically stable material disposed adjacent to the PG layer. Further, the PG layer and the second layer can form a taper angle relative to the ABS ranging between 30 and 60 degrees.

The application provides a method for exciting interband plasmons of double-layer graphene and a prepared device, and belongs to the technical field of optical devices, and comprises the following steps: sequentially laminating a third insulating layer, double-layer graphene and a second insulating layer to form a vertical heterojunction, transferring the vertical heterojunction to a substrate on which a first insulating layer is grown, obtaining a clean initial device substrate through heating separation and solvent cleaning, then preparing a nanoscale metal grating layer on the vertical heterojunction surface of the initial device substrate to form a device intermediate body, and preparing electrodes on the left and right sides of the device intermediate body, so that the electrodes are electrically connected with the double-layer graphene, an electrical regulation channel of the Fermi surface of the double-layer graphene is constructed, and a complete device for exciting interband plasmons is obtained. The nanoscale metal grating array can effectively excite interband plasmons of double-layer graphene, significantly improve the light-plasmon coupling efficiency and realize energy regulation of interband plasmons.

The utility model discloses an artificial surface plasmon filter, which belongs to the technical field of microwaves and comprises a ground layer, a dielectric plate A, an SSPP unit layer A, a dielectric plate B, an SSPP unit layer B, a dielectric plate C, an SSPP unit layer C and a half-mode substrate integrated waveguide which are sequentially arranged from bottom to top. A cylinder B is arranged between the SSPP unit layer A and the SSPP unit layer B. A cylinder C is arranged between the SSPP unit layer A and the SSPP unit layer C. The length of the SSPP unit layer B is smaller than that of the SSPP unit layer A. The half-mode substrate integrated waveguide comprises a metal sheet and thirteen cylinders A which are equal in height and radius. The upper surface of the dielectric plate C is provided with two microstrip lines, and the microstrip lines are connected with the metal plate. The size of the filter is reduced through the three-dimensional heterogeneous integration technology, the progressive frequency of an SSPP structure is greatly reduced, the field constraint effect is enhanced, and better performance can be achieved under the condition that the size is more compact.

The utility model discloses an exciton polaron laser based on open microcavity, including casing, piezoelectric displacement platform, upper DBR mirror and lower DBR mirror, the cavity with one -way opening has in casing, upper DBR mirror is assembled in the cavity, and is close to the opening, lower DBR mirror is provided with exciton gain dielectric layer, piezoelectric displacement platform can lift and lower the assembly in the cavity far from the opening one side, lower DBR mirror is fixed in piezoelectric displacement platform, to make lower DBR mirror close or far from upper DBR mirror, and piezoelectric displacement platform is used for fine adjustment lower DBR mirror's displacement distance, such can respectively coarse adjustment and fine adjustment to the microcavity cavity length between upper DBR mirror and lower DBR mirror, and then guarantee the strong coupling state between exciton and cavity photon, after continuing to increase the light power, can form polarized plasmon condensation, also can conveniently regulate and control the energy difference between cavity photon and exciton.

The invention relates to the technical field of microfluidics, in particular to a light-heat-sound microflow pump based on a metamaterial absorber and a preparation method of the light-heat-sound microflow pump. The technical key points are as follows: a bottom metal film, a dielectric layer and a top metal structure array are sequentially formed on a substrate to prepare the metamaterial absorber chip with the plasmon photothermal effect; spin-coating the metamaterial absorber chip with polydimethylsiloxane, and carrying out drying and curing treatment to obtain the metamaterial absorber chip with a light-taking effect; the optical-thermal-acoustic micro-flow pump with the fluid driving and mixing capabilities can be obtained by irradiating the metamaterial absorber chip with the optical effect by using laser, non-contact, remote and high-precision driving of micro-fluid is realized, and the optical-thermal-acoustic micro-flow pump has the technical effects of simple structure, high driving efficiency, high response speed and no need of complex external equipment.

The utility model discloses a biosensor with a large detection range, which comprises an optical fiber body, a sensing area is formed on the optical fiber body, and a gold film layer and an indium gallium arsenic and gold nanoparticle film layer are respectively attached to the surface of the sensing area from inside to outside. According to the technical scheme, the surface electric field intensity of the gold film is improved by utilizing high carrier mobility and high light absorptivity of indium gallium arsenic, the sensitivity of the sensor is further improved, and an enhanced local electric field is generated between the indium gallium arsenic film and the gold nanoparticles by utilizing mutual coupling of surface plasmon polaritons of indium gallium arsenic and local plasmon polaritons generated by the gold nanoparticles, so that the sensitivity of the sensor is improved. The sensor structure provided by the technical scheme has relatively high sensing sensitivity and chemical stability, real-time monitoring can be realized, and the detection range of the biosensor is further expanded.

The invention discloses a polarization reconfigurable circularly polarized antenna designed by using an artificial surface plasmon structure, which is etched on an upper metal layer of a single-layer dielectric plate, and comprises four rectangular radiation patches which are distributed in a central symmetry manner and respectively correspond to a first feed port, a second feed port, a third feed port and a fourth feed port; the two artificial surface plasmon structures are in a bent line shape, and the two ends of each artificial surface plasmon structure are electrically connected to the two adjacent rectangular radiation patches respectively, so that a phase delay path is formed between the adjacent feed ports; the one-to-four microstrip feed network comprises a main feed line and four branch feed lines led out from a node of the main feed line; the four radio frequency switches are respectively connected in series with the four branch feed lines and the four corresponding rectangular radiation patches; and by controlling the alternate connection and disconnection of two groups of diagonal switches in the four radio frequency switches, radio frequency signals are fed in through different feed ports and are transmitted through the artificial surface plasmon structure, so that phase delay is realized to output circularly polarized waves.

The invention discloses an ultrathin metal-two-dimensional material plasmon composite structure, a preparation method and a frequency doubling converter. The structure is composed of a single crystal metal plasmon structure with the thickness smaller than 10 nm and a two-dimensional material. The ultrathin single crystal metal plasmon structure not only is matched with the two-dimensional material on the physical scale, but also can generate extremely strong light field localization and enhancement effects, so that the intensity and efficiency of interaction between light and the two-dimensional material are remarkably improved. Based on the ultrathin composite structure, an ultrathin frequency doubling converter is constructed, so that the frequency doubling conversion efficiency of the two-dimensional material is enhanced by 91 times. The invention provides a brand new technical platform and solution for developing ultrathin, flexible and high-performance optoelectronic devices.

The invention discloses a preparation method and application of a rare earth / bimetal synergistically enhanced composite photocatalyst, the rare earth / bimetal synergistically enhanced composite photocatalyst comprises a defect type titanium dioxide TiO2-x carrier rich in oxygen vacancies, copper-nickel bimetal nanoparticles are loaded on the TiO2-x carrier, and rare earth elements are doped on the TiO2-x carrier; the rare earth element is at least one or any combination of ytterbium, erbium, neodymium, cerium and dysprosium, and the doping amount of the rare earth element is 0.1-1%; the molar ratio of copper to nickel is 1: (0.9-1.1); the molar ratio of the sum of the molar weights of copper and nickel to TiO2-x is 2: (6-7). According to the invention, three mechanisms of defect engineering, bimetallic plasmon effect and rare earth element modification are synergistically combined, so that the prepared catalyst has full-spectrum response capability and efficient photo-generated charge separation efficiency, and shows excellent degradation performance on antibiotic pollutants such as norfloxacin under visible light and near-infrared light; and the preparation method is simple and low in cost, and has a wide application prospect.

The application discloses a kind of optical nerve unit device, the construction method of deep learning optical nerve network, it is related to neural network technical field, including contact metal electrode, graphical graphene array, dielectric layer film and substrate, the graphical graphene array is contacted with dielectric layer film formed on substrate, the contact metal electrode is contacted with graphical graphene array and is used to generate electric field with substrate, regulate device output optical signal as the input weight of synapse, the graphical graphene array includes graphene and infrared light source wave, the graphene is single-layer graphene, the graphical graphene array unit is periodic strip, the beneficial effects of the application are: compared with other materials, graphical graphene is due to high carrier density and support surface plasmon propagation, provides an incomparable advantage, i.e. in room temperature to terahertz range in the wavelength of mid-infrared can be in situ dynamically tuned by using gate voltage.

A hybrid catalytic nanoreactor having selectivity and stability in presence of air is provided for reduction reactions including semi-hydrogenations comprising of light harvesting dendritic plasmonic colloidosomes (DPC) of gold preferably as black gold and co-acting synergistically active catalytic sites of Pt-doped Ru bimetallic nanoparticles for desired significantly special selectivity and air-stability as a plasmonic reduction catalyst favoring plasmon-mediated simultaneous reduction and oxidation of metal active sites for facilitating reduction reactions including semi-hydrogenation activity. Said black gold / RuPt catalyst showcases good efficiency in acetylene semi-hydrogenation, attaining over 90% selectivity with ethene production rate of 320 mmol g−1 h−1 with its stability evident from 100 h of operation with continuous air flow, attributed to the synergy of co-existing metal oxide and metal phases. The catalyst's stability is further enhanced by plasmon-mediated concurrent reduction and oxidation of the active sites, facilitating its end use and applications in chemical industries, petrochemical industries, and applications catalysis.

The invention belongs to the technical field of copper-based catalytic materials and water treatment, and particularly relates to a solar thermal field-electro-catalysis synergistic copper-based catalytic material for groundwater pollution remediation, a preparation method, a water treatment device and application. According to the copper-based catalytic material, the high catalytic activity of copper single atoms, the plasmon resonance effect of metal clusters and the excellent H2O activation capacity of a CN substrate are utilized, the photothermal effect is generated through optical excitation, the mass transfer rate of H2O to the substrate is remarkably increased, the dissociation reaction of H2O is promoted, protons and active hydrogen are efficiently generated, and electrochemical hydrodehalogenation and NO3-electrocatalytic reduction are driven. The process effectively solves the problem of reaction kinetics limitation caused by low proton transfer efficiency in the traditional process, greatly accelerates proton transfer and optimizes electron-proton cooperative transfer efficiency, and provides a new way for research and development of groundwater organic-inorganic pollution cooperative treatment and sustainable development technologies. The method has the advantages of remarkable environment and energy conversion.

This invention relates to a reconfigurable metasurface for dynamically controlling the topological characteristics of electromagnetic polaritons. The invention comprises a basic functional unit combined with a varactor diode periodically extended in a two-dimensional plane. The basic functional unit includes a single-layer dielectric, two layers of metal, and metallized vias. By changing the applied bias voltage, reconfigurable topological transmission of the polariton dispersion topology can be achieved, from open ellipses to straight lines, hyperbolas, and circles. Utilizing the wavefront characteristics under different dispersion topologies, broadband field channelization, dynamic focusing, and reconfigurable polariton circuit design can be realized. This invention further improves the flexibility of surface wave propagation and guidance manipulation, possessing advantages such as low dimensionality, continuous controllability, and high-speed response. It is beneficial for the integration of electromagnetic components in modern near-field information processing systems, the design of photonic integrated circuits and multifunctional programmable plasmon polariton devices, and has broad application prospects in near-field sensing, positioning, high-resolution imaging, and energy reuse.

The application provides a square-shaped heterostructure terahertz metamaterial sensor device and a preparation method thereof. The device comprises a heterostructure sandwich structure which is formed by constructing a multilayer structure on a silicon material. The multilayer structure is composed of a top metal square array unit, a middle dielectric layer and a bottom metal reflection layer. The sensor device controls the full width at half maximum of the plasmonic resonance peak by adjusting the thickness of the dielectric layer to achieve wide resonance enhancement. The metal square array unit adopts two structure size parameters, and the overall architecture scaling realizes the spectral response of different wave bands. When the sensor device works, the terahertz wave is vertically incident on the heterostructure sandwich structure and induces the excitation of the plasmonic mode, so that the signal of the outgoing terahertz wave received by the terahertz receiver presents the super-wideband resonance characteristic. The application can control the spin coating speed of photoresist to customize the wide-spectrum resonance characteristic of the plasmon excited by the square-shaped heterostructure terahertz metamaterial under two different structure scales.