29 results about "Plasmon" patented technology

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 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 application belongs to the technical field of optical fiber sensing, and relates to a negative curvature hollow optical fiber temperature sensor based on LSPR effect, which comprises an outer layer structure, the radial section of the outer layer structure is circular, six cladding tubes are arranged in the inner part of the outer layer structure, the six cladding tubes are all inscribed in the inner surface of the outer layer structure, the included angle between the center lines of two adjacent cladding tubes and the center line of the outer layer structure is 60 degrees, gold nanowires are deposited on the cladding tubes in the positive direction of the y-axis, the remaining space of the outer layer structure except the cladding tubes is filled with temperature-sensitive liquid, and the region close to the center of the optical fiber and surrounded by the six cladding tubes in the center direction forms a fiber core region of the optical fiber. The optical fiber temperature sensor provided by the application introduces the localized plasmon technology into the optical fiber, can effectively improve the regulation and control of the evanescent field of the sensor, excite the LSPR effect, and further realize high-performance sensing response.

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.

The application discloses a planar vortex orbit angular momentum antenna based on artificial surface plasmons. The application comprises a resonant antenna and a feeding system; the resonant antenna comprises an artificial surface plasmon metal ring and a first dielectric plate; the feeding system comprises a second dielectric plate, an air dielectric layer, a metal ground, a third dielectric plate and a feeding network; two microstrip stubs are arranged on the third dielectric plate, and a small metal disc is arranged at the end of each microstrip stub; the microstrip stubs are connected with the feeding network through metal vias; the surface impedance of the slotted unit of each artificial surface plasmon unit in the artificial surface plasmon metal ring is the same or different. The application can emit a vortex wave beam carrying a precisely defined orbit angular momentum on a plane, and through synthesizing multiple wave beams at a fixed frequency, the multiple wave beams can be superimposed to form a new wave beam, so that the shape of the wave beam can be controlled. The wave beam scanning can be realized by adjusting the surface impedance distribution of each wave beam.

This invention belongs to the field of wireless communication technology, specifically a communication system and method based on a semiconductor plasmon low-energy photon detector. The system includes a signal transmitter, a signal receiver, and a signal processing and decoding unit. The signal transmitter transmits modulated low-energy photon signals (such as millimeter waves or terahertz waves) carrying coded information. The core component of the signal receiver is a plasmon low-energy photon detector based on a narrow-bandgap semiconductor, utilizing a plasmon-induced non-equilibrium electron mechanism to achieve photoelectric conversion. The signal processing and decoding unit is used to reconstruct the original information. This invention utilizes the microsecond-level high-speed response characteristics of semiconductor plasmon detectors to achieve real-time wireless information transmission in the low-energy photon band at room temperature. The system has a simple structure, is industrially compatible, requires no cooling, and has a high transmission rate, making it valuable for applications in industrial IoT, short-range secure communication, and 6G remote sensing.

This protective cover for an electric vehicle charging connector comprises: a main body having an accommodating groove in which a connector pin can be accommodated; a dummy pin which extends, inside the accommodating groove, along the formation direction of the accommodating groove, and can be fitted to the connector pin by male-female fitting; and a metal nanoparticle film coated on a surface of the dummy pin, wherein plasmons are formed on a surface of the connector pin by an evanescent wave generated by the total reflection of light, passing through the dummy pin, at an interface between the dummy pin and air.

The application discloses a true time delay line based on a misaligned symmetric artificial surface plasmon structure and belongs to the field of novel microwave devices, comprising a metal ground, a dielectric substrate arranged above and below the metal ground, a true time delay line structure arranged on the dielectric substrate above the metal ground, the true time delay line structure comprising an artificial surface plasmon waveguide periodically arranged by a plurality of misaligned symmetric artificial surface plasmon unit structures loaded with varactor diodes, a microstrip line for feeding the artificial surface plasmon waveguide, and a varactor diode bias circuit composed of a metal patch and the microstrip line. The true time delay line based on the misaligned symmetric artificial surface plasmon structure has the characteristics of approximately constant time delay value in a wideband range, real-time regulation of the time delay value through the varactor diode, low insertion loss and easy processing, and has a wide application prospect in a wideband phased array system.

This invention provides an end-fire Vivaldi filter antenna with independently controllable cutoff frequency based on an equivalent artificial surface plasmon polariton (ESP). It comprises a dielectric substrate, with a top layer and a bottom layer formed on the upper and lower surfaces of the substrate, respectively. The bottom layer has a ground metal layer. An ESP bandpass filter based on a hybrid substrate integrated waveguide structure is embedded in the middle of the substrate. The top layer has a first microstrip line, a second microstrip line, and a first Vivaldi antenna. One end of the first microstrip line serves as the antenna feed port and is connected to the ground metal layer via a microwave high-frequency connector. The other end of the first microstrip line is connected to the first Vivaldi antenna sequentially via the second microstrip line and the ESP bandpass filter based on the hybrid substrate integrated waveguide structure. This invention enables independent control of the passband cutoff frequency and out-of-band cutoff frequency, exhibiting independently controllable bandwidth, stable stopband, and deep out-of-band suppression capabilities.

This can improve the detection efficiency of photocurrent. [Solution] The photodetector comprises a semiconductor layer having a roughened main surface and a charge potential gradient in the direction normal to the main surface, and a metal layer arranged along the main surface that moves charges generated by plasmon resonance in response to the amount of incident light, which have energy greater than the potential barrier of the main surface, to the semiconductor layer.

This invention discloses a broadband high-absorption solar absorber based on a hollow cross-ring structure. The absorber is composed of a periodic array of hollow cross-ring structural units. Each unit, from top to bottom, includes a metallic iron (Fe) resonator layer, a silicon dioxide (SiO₂) dielectric layer, a gallium arsenide (GaAs) layer, and a metallic Fe reflective layer. The metallic iron resonator employs a hollow cross-ring structure design. Through optimized structural design, material selection, and key parameter matching, this invention achieves highly efficient light energy capture over a wide spectral range: an average absorptivity of 98.47% in the 498-1988 nm wavelength range, a continuous bandwidth exceeding 90% at 1490 nm, and a weighted absorption efficiency of 97.96% under the AM1.5 standard solar spectrum, with an energy loss rate of only 2.04%. The excellent absorption performance of this absorber stems from the surface plasmon resonance, gap plasmon resonance, and synergistic coupling effect between the unit structures excited by the hollow cross-ring structure. Meanwhile, the overall structure is only 243 nanometers thick, exhibiting ultra-thin characteristics, high stability, and good fabrication tolerance. This invention can be widely applied in fields of high-efficiency solar energy utilization such as photovoltaic power generation and photothermal conversion, providing new ideas for the development of next-generation high-efficiency solar energy devices and possessing significant engineering application value.

The application discloses a kind of harmonic amplitude frequency modulators based on artificial surface plasmon, belong to novel microwave device field, by metal backplate, upper layer metal structure and separate dielectric layer constitute, upper layer metal structure is by the periodic arrangement of artificial surface plasmon unit structure loaded with PIN tube into time domain coding artificial surface plasmon waveguide, transition structure being arranged at the two ends of the time domain coding artificial surface plasmon waveguide, and high-frequency isolation structure of connection control signal composition, by controlling the period and duty cycle of the square wave signal, the frequency and amplitude adjustment of output harmonic signal are carried out, and 0 order harmonic is filtered out, the application has the amplitude frequency of output harmonic signal adjustable, can filter out 0 order harmonic, with the advantages of easy processing, small size and low cost.

This invention is a method for trace Pb. 2+ This invention relates to the field of sensing and detection technology, specifically the detection of a PATP dimer-AuCu / 1T-MoS₂ electrochemical-photoelectrochemical dual-mode sensor, its preparation, and its application. The invention utilizes PATP polymers under alkaline conditions as a Pb... 2+ The probe utilizes the signal amplification effect of the AuCu / 1T-MoS₂ nanocomposite material to detect Pb. 2+ Trace detection of Pb. AuCu / 1T-MoS₂ nanocomposites exhibit good electrical conductivity and plasmon resonance characteristics under illumination, which not only improves the electron transport performance at the sensor interface but also enhances the stability of the sensing analysis. PATP dimer and AuCu / 1T-MoS₂ nanocomposites have a synergistic effect; therefore, the PATP dimer-AuCu / 1T-MoS₂-based electrochemical sensing method has the characteristics of high sensitivity and high selectivity, and is effective for Pb detection. 2+ The detection linear range is 1–1000 nM, and the detection limit is 0.06 nM. Under illumination, the detection limit further decreases to 0.013 nM. The above-mentioned electrochemical-photoelectrochemical dual-mode sensor is controllable, produces no secondary pollution, and enables real-time, in-situ monitoring of Pb in water. 2+ It has broad application prospects.

The application discloses a kind of multi-bit digital phase shifters based on time coding artificial surface plasmon, belong to novel microwave device field, partial above dielectric substrate includes two groups of phase shift units, two bias circuits and first and last two microstrip lines, the part below dielectric substrate is a layer of metal ground.The phase shift unit is periodically arranged by the U-shaped artificial surface plasmon unit structure loaded with PIN tube, and the two groups of phase shift units are loaded with patch capacitors.The multi-bit digital phase shifter of the application only needs two control signals and two kinds of phase shift units to realize the function of arbitrary bit digital phase shifter, with the characteristics of less control signal, small size, simple structure, easy to design, and high practical value.

This invention discloses a modulator and its control method based on thin-film lithium niobate-silicon heterointegration. The modulator includes a silicon substrate, a buried oxide layer, a silicon waveguide layer, and an upper cladding layer. The silicon waveguide layer contains two interferometer arms constituting a Mach-Zehnder interferometer. The phase modulation region of each interferometer arm is divided into at least three segments, including silicon-based phase modulation segments at both ends and a thin-film lithium niobate-silicon heterointegrated phase modulation segment in the middle. The silicon-based modulation segments utilize the plasmon dispersion effect for phase modulation, while the lithium niobate modulation segment utilizes the linear electro-optic effect for phase modulation. An inverse driving signal is applied to the silicon-based modulation segments of both arms, and an in-phase driving signal is applied to the lithium niobate modulation segment. This invention significantly improves modulation linearity and flexibly controls chirp parameters by synergistically utilizing the modulation characteristics of the two materials and independently controlling the amplitude and phase of the driving signal, while achieving low driving voltage and high modulation efficiency, and is compatible with CMOS processes.

The application discloses a double-dimension multi-gas sensor based on artificial plasmons and a gas detection system, wherein the sensor comprises, from bottom to top, a grounding plate, a dielectric substrate, a metal microstrip transmission line, a bottom sensitive dielectric layer, an artificial plasmon resonator and a first conductive layer and a second conductive layer at the same height level; the sensor is based on a vertical laminated structure to construct single-resonator double-dimension orthogonal decoupling; wherein the artificial plasmon resonator and the bottom sensitive dielectric layer construct a response mechanism of 'bottom dielectric constant-resonance frequency shift' to a target gas A; the artificial plasmon resonator and the first conductive layer and the second conductive layer construct a response mechanism of 'top layer conductivity-resonance amplitude modulation' to a target gas B. The application utilizes a vertical laminated structure to construct two independent detection dimensions on the projection area of only one single resonator, and realizes simultaneous detection and decoupling of two gases.

A defect detection system configured to control an energy source to transmit a deep ultraviolet (DUV) laser light at a wavelength along an incident path at different time periods; direct the laser light from an initial angle of transmission to obtain first angles of incidence of the laser light along the incident path at the different time periods; control a polarizer to generate polarized DUV laser light at the different time periods; obtain far-field images for each of the near-field interaction patterns with an image sensor based on the polarized DUV laser light; compare reference patterns with the far-field images in a neural network model, wherein each of the reference patterns is an image of an expected designed patterned reflector transmitter (PRT) pattern with sub-micron features; and obtain an inference on nanometer scale defective distributions in the PRT based on comparing the far-field images with the reference patterns.

The application discloses a kind of broadband omnidirectional antennas based on artificial surface plasmon, belong to omnidirectional antenna technical field.It includes by upper to lower sequentially connected upper layer patch, circular substrate and lower layer patch, and the center of circular substrate is connected with coaxial connector by center patch, and form omnidirectional radiation characteristics;Upper layer patch and lower layer patch structure are same, and constitute dipole with upper and lower correspondence;Upper layer patch includes eight pieces of sector patch that are arranged in clockwise direction, and form hub shape;Sector-shaped guide plate of sector patch is connected with center patch by microstrip transmission line, and artificial surface plasmon transmission line that is composed of 30 artificial surface plasmon units and is equidistantly arranged is arranged in sawtooth shape on microstrip transmission line.The working bandwidth range of the antenna of the application is 4.71~7.29GHz, and total efficiency reaches 78.5%.The overall diameter size of antenna is 0.92λ, and section height is 1mm.The application realizes the requirement of low cost, low profile, low loss, easy to integrate with planar circuit for omnidirectional antenna under C and XC wave band.

The application discloses a compact free electron vortex laser based on a planar topological cavity. The device combines the concept of artificial surface plasmons and the principle of topological photonics, and comprises a planar topological cavity and a linear electron beam source. The planar topological cavity is composed of two kinds of valley photonic crystals, and the cell structure is a pair of unequal-diameter metal cylinders placed on a metal substrate, and supports an echo wall mode with a longitudinal electric field component through a topological boundary state at a domain wall. The electron beam generated by the electron beam source moves along the linear edge of the topological cavity, and interacts with the topological boundary state through the Smith-Purcell radiation effect. The application utilizes the topological protection characteristics to realize efficient in-plane feedback in a compact triangular loop, thereby generating stimulated radiation, and can synchronously adjust the frequency and topological charge number of the output laser by changing the electron velocity, and can be applied to light manipulation, high-resolution imaging and wireless communication and other scenes with high requirements for miniaturization and tunable vortex sources.

This invention proposes a plasmonic-enhanced nanocone structure for detecting micro / nanoplastics and other contaminants, its preparation method, and its applications. The plasmonic-enhanced nanocone structure exhibits a gold-silver nanoparticle bimetallic hollow nanostructure (BHNC-Au / Ag). This structure can achieve a density as high as 1.1 × 10⁻⁶. 8 Physical enhancements and self-constructed enrichment of target stratified analytes for size-matched hotspot regions were employed. Intrastructural stratified hotspots (DSHSs, DVHSs, and LHSs) were identified to promote the enrichment of target contaminants in optimal hotspot regions, thereby enhancing the enrichment of micro / nanoplastics smaller than 5 micrometers (down to 10 μm) at typical geometric scales. ‑8 g / L), small molecules (down to 10 g / L) ‑13 M) and SARS-CoV-2S protein (down to 10) ‑9 M) for high-sensitivity detection. The technical solution provided by this invention offers a practical solution for the trace detection of layered micro / nano plastics and other mixed water contaminants.

The application discloses a double-dimension multi-gas sensor based on artificial plasmons and a gas detection system, wherein the sensor comprises, from bottom to top, a grounding plate, a dielectric substrate, a metal microstrip transmission line, a bottom sensitive dielectric layer, an artificial plasmon resonator and a first conductive layer and a second conductive layer at the same height level; the sensor is based on a vertical laminated structure to construct single-resonator double-dimension orthogonal decoupling; wherein the artificial plasmon resonator and the bottom sensitive dielectric layer construct a response mechanism of 'bottom dielectric constant-resonance frequency shift' to a target gas A; the artificial plasmon resonator and the first conductive layer and the second conductive layer construct a response mechanism of 'top layer conductivity-resonance amplitude modulation' to a target gas B. The application utilizes a vertical laminated structure to construct two independent detection dimensions on the projection area of only one single resonator, and realizes simultaneous detection and decoupling of two gases.

The application belongs to the technical field of optical fiber sensing, and particularly relates to a kind of optical fiber sensors based on magneto-optical surface plasmon resonance. The optical fiber sensor is formed by removing the cladding of a single-mode optical fiber through polishing and grinding to form a D-shaped optical fiber region; a metal film and a magneto-optical film are sequentially coated on the plane of the D-shaped optical fiber region to form a D-shaped optical fiber sensing region; a magnetic field is applied in the vertical direction of the optical fiber sensing region; probe light from a broadband light source is input from one end of the single-mode optical fiber, passes through the optical fiber sensing region, is output from the other end of the single-mode optical fiber, and is detected by a spectrometer; when the refractive index of the external environment in contact with the magneto-optical material film changes, the change in the resonance peak wavelength in the MOKE spectrum of the sensor will be caused, and the sensing of the refractive index of the external environment is realized by detecting the resonance wavelength. Compared with the optical fiber SPR sensor, the application greatly improves the quality factor while maintaining high sensitivity, thereby improving the actual detection accuracy of the sensor.