37 results about "Polariton" patented technology

Provided are a polariton device, a polariton system, a method of manufacturing the polariton device, and a method of controlling the polariton device. The polariton device includes a cavity including a gain layer including a ferroic material that undergoes a phase transition into an asymmetrical crystal structure in response to an external stimulus, an upper reflective layer formed on top of the cavity, a lower reflective layer formed below the cavity, and a Rabi frequency controller configured to control a Rabi frequency of the polariton device by providing a stimulus to the gain layer.

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.

An optical gate device may have one or more optical cavities. The optical cavity may have an embedded optically-active material providing strong light-matter coupling. A pump input allows application to of a pulsed optical pump beam the optically-active material. The pump beam is absorbed by the optically active material to form an exciton-polariton condensate which emits light. The optical gate device may have an input waveguide to input a seed signal to the optical cavity. The optical gate device may include an output waveguide to output of an optical signal at a wavelength corresponding to a resonant mode of a the cavity. The device may operate in a manner such that, when the pump beam is applied to the pump input, an optical output signal is selectively provided in the output waveguide, via the input of the a seed signal and light emitted by the exciton-polariton condensate.

The invention provides a plasmon copper-based nano material, a preparation method thereof and application of the plasmon copper-based nano material in a carbon dioxide capture-conversion system.The preparation method comprises the steps that a copper nanowire modified by polytetrafluoroethylene is adopted as a plasmon catalyst, carbon dioxide is efficiently adsorbed and captured through organic amine, and under excitation of polarized light with the specific wavelength, the carbon dioxide is converted into the plasmon copper-based nano material. And efficient carbon dioxide electroreduction is realized. Compared with the prior art, carbon dioxide capture and photoelectrocatalysis carbon dioxide conversion of the plasmon copper-based nano material are combined, rapid capture and release of carbon dioxide are achieved, and the Faraday efficiency of reducing carbon dioxide into methane reaches up to 90% or above. The invention constructs a carbon dioxide capture-conversion system with industrial application potential, and provides a new path for realizing energy conservation and emission reduction.

Disclosed herein is a microcavity and patterns thereof comprising a photoluminescent material positioned between two reflectors, wherein the photoluminescent material comprises a cationic molecular dye, a macrocyclic anion receptor host, and an anion embedded within the macrocyclic anion receptor host and methods of making and using the same.

This invention relates to a pattern-reconfigurable antenna based on artificial surface plasmon polaritons (SSPPs), belonging to the field of antenna technology. The antenna includes a coplanar waveguide feed line, a transition structure, a reconfigurable SSPP waveguide, and periodic radiating elements. The reconfigurable SSPP waveguide modifies the dispersion characteristics by adding a varactor diode to a traditional SSPP element and adjusting the capacitance value using a bias circuit. The periodic radiating elements are elliptical patches with rectangular slots, coupled to the reconfigurable SSPP waveguide to radiate electromagnetic waves. This invention solves the problems of single radiation direction in traditional antennas and low gain in existing reconfigurable antennas. It achieves fixed-frequency beam scanning (maximum 23°) and frequency beam scanning (maximum 90°) in the 11.5GHz-15GHz frequency band, with gains greater than 9dBi (maximum 11.1dBi), expanding the detection range and increasing the detection distance, making it suitable for fields such as UAV detection.

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 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.

The application relates to an active electromagnetic metasurface for realizing programmable topology polariton waveguide, which is composed of basic functional units combined with varactor diodes and periodically extended in a two-dimensional plane; the basic functional unit comprises two layers of dielectric, four layers of metal and a metallized via; by changing the applied bias voltage, reconfigurable topology transmission of magnetic polariton dispersion topology from ellipse to straight line and hyperbola can be realized; by means of wavefront characteristics under different dispersion topologies, adjustable field channeling and reconfigurable flat panel focusing functions and programmable topology polariton waveguide design can be realized. The application supports flexible propagation and guiding manipulation of surface waves, has the advantages of low dimension, real-time response, continuous controllability and high stability, provides an effective platform for active optoelectronic integrated circuit research, is beneficial to the design of planar integrated high-speed communication components, high-resolution imaging and high-sensitivity sensing and positioning systems, and has wide application prospects in the fields of near-field information processing and energy collection.

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 invention relates to a directional diagram reconfigurable antenna based on artificial surface plasmon polaritons, and belongs to the technical field of antennas. The antenna comprises a coplanar waveguide feeder line, a transition structure, a reconfigurable SSPP waveguide and a periodic radiation unit. According to the reconfigurable SSPP waveguide, a variable capacitance diode is added on a traditional SSPP unit, and a bias circuit is matched to regulate and control a capacitance value so as to change dispersion characteristics; the periodic radiation unit is an elliptical patch with a rectangular slot, and is coupled with the reconfigurable SSPP waveguide to radiate electromagnetic waves. According to the reconfigurable antenna, the problems that a traditional antenna is single in radiation direction and an existing reconfigurable antenna is low in gain are solved, fixed-frequency beam scanning (23 degrees to the maximum) and frequency beam scanning (90 degrees to the maximum) are achieved within the frequency band of 11.5-15 GHz, the gain is larger than 9 dBi (11.1 dBi to the maximum), the detection range can be expanded, the detection distance can be increased, and the reconfigurable antenna is suitable for the fields of unmanned aerial vehicle detection and the like.

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 discloses a tunable one-way and two-way microwave notch filter and a design method. The filter has one-way and two-way filtering functions. The structure of the device mainly comprises an artificial surface plasmon polariton planar waveguide and a ferrite yttrium iron garnet microwave resonator, a circular polarization spin polarization microwave field with a spin-momentum locking characteristic is generated at a specific position in the planar waveguide, a magneton mode generated in the microwave resonator and the spin polarization microwave field are subjected to spin selective coupling, and under the critical coupling condition, microwaves input in one direction are completely filtered after passing through magneton, and then are subjected to spin polarization. And the microwaves input in the other direction are completely transmitted, so that the unidirectional filtering function of the microwaves at a specific frequency is realized. And an additional microwave resonator is further loaded, and the bidirectional filtering function can be realized by expanding the experimental configuration. The invention does not need complex structural design and strict parameter regulation and control, and provides a simpler, more convenient and more flexible method to realize the multifunctional microwave notch filter.

The invention relates to the technical field of semiconductors, and discloses an infrared detector and a preparation method thereof, a photoelectric detection device and an infrared imaging system, and the infrared detector comprises a long-wave infrared detection layer and a target microstructure formed on the first side of the long-wave infrared detection layer. Wherein the long-wave infrared detection layer is made of tellurium cadmium mercury; the target microstructure comprises at least two rectangular substructures; the target microstructure is coupled with the target incident light to excite the surface phonon polaritons, so that the energy of the target incident light is localized at the boundary of the target microstructure and the long-wave infrared detection layer to enhance the photoelectric coupling capability of the long-wave infrared detection layer. The beneficial effects are that the target microstructure comprising at least two rectangular substructures is formed on the first side of the long-wave infrared detection layer, so that the absorption competition between the microstructure and the detection layer is effectively inhibited, and the photoelectric coupling capability of the detection layer is improved. And finally, the responsivity, the absorptivity and the polarization detection capability of the infrared detector are remarkably improved.

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.

Disclosed herein are Tamm polariton emitters and methods of making and use thereof. The Tamm polariton emitters disclosed herein comprise: a distributed Bragg reflector; and a layer comprising a conductive and / or polaritonic material; wherein the distributed Bragg reflector is disposed on the layer of the conductive and / or polaritonic material. The Tamm polariton emitters can further include a layer of a polar material. Also disclosed herein are non-dispersive infrared sensors comprising: any of the Tamm polariton emitters disclosed herein, wherein the Tamm polariton emitter is configured to selectively emit radiation at a frequency corresponding to a rotational or vibrational resonance frequency of an analyte of interest; and a detector configured to receive an electromagnetic signal from the Tamm polariton emitter and / or the analyte of interest. Also disclosed herein are methods for designing Tamm polariton emitters. The methods can, for example, comprise an inverse design protocol and / or machine learning.

The application 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 low-pass filter comprises a dielectric substrate, the upper surface of the dielectric substrate is provided with a coplanar waveguide, and the lower surface of the dielectric substrate is provided with a spur line unit array. The coplanar waveguide comprises a center conductor strip and ground strips symmetrically distributed on both sides of the center conductor strip. An L-shaped slot unit array is etched on the ground strips. The L-shaped slot unit array is distributed along the length direction of the coplanar waveguide. The low-pass filter comprises a filter unit and transition units symmetrically arranged at both ends of the filter unit. The projection of the spur line unit array on a plane perpendicular to the wave propagation direction is aligned with the center of the filter unit. The low-pass filter based on the spur line structure can realize adjustable dispersion cutoff frequency and sharp transition from a passband to a stopband, and has simple structure and miniaturization.

This invention discloses an optoelectronic device based on a two-dimensional material heterojunction and its fabrication method. The optoelectronic device includes: a substrate; an optical resonant cavity located on the substrate, the optical resonant cavity including a first reflector and a second reflector disposed opposite to each other; and a tunneling junction disposed between the first reflector and the second reflector in the optical resonant cavity. The tunneling junction includes a first two-dimensional material layer, a first insulating layer, and a second two-dimensional material layer sequentially stacked between the first reflector and the second reflector. The first two-dimensional material layer and the second two-dimensional material layer are transition metal sulfide layers of different materials. This invention combines an optical resonant cavity with a two-dimensional material heterojunction, significantly improving energy transfer efficiency through a polariton relaxation mechanism, and has broad application potential in fields such as nanophotonics, quantum computing, and high-performance displays.

This invention discloses a bandwidth-controllable compact ridge waveguide cavity bandpass filter based on SSPP and its fabrication method. The device includes a cavity containing a ridge waveguide. Several inverted T-shaped grooves are etched at intervals on the ridge waveguide, forming a structure where the middle section is an artificial surface plasmon polariton (SSPP) and the left and right ends are transitional SSPP structures. The transitional SSPP structures at the left and right ends are respectively connected to horizontal coaxial connectors. Dual grating structures are respectively provided on both sides of the ridge waveguide within the cavity. This invention achieves a wideband bandpass structure of 7.6GHz–12.4GHz by integrating the ridge waveguide, SSPP, and dual gratings into a single cavity. It achieves a return loss below -16dB and an insertion loss of 0.23dB within the band. Low loss and small size are achieved within a 44.8% wideband, and the passband bandwidth can be flexibly tuned.

A continuous-wave perovskite polariton laser device, including an optical microcavity, a spacer layer, and a gain medium. The gain medium is a perovskite material or a composite material containing perovskite, in a form of thin film, microcrystal, phosphor, nanocrystal, quantum dot, or single crystal. The perovskite gain medium is prepared by solution process or vacuum deposition technique, and is combined with an optical resonator. By exploiting the strong interaction between excitons and photons, a steady-state exciton-polariton condensation is formed, enabling the generation of continuous-wave polariton laser emission with a low threshold. The laser device can achieve low-threshold continuous-wave or pulsed lasing emission at room temperature under various light sources pumping or electrical excitation. Its threshold is 1 to 3 orders of magnitude lower than that of conventional semiconductor lasers, with an optimized threshold as low as 0.1 to 1 W / cm2, representing a novel ultralow-power coherent light source technology.

The present application provides display panels, transparent display panels and manufacturing methods therefor. A transparent display panel includes a light transmitting substrate, pixel structures, second electrode connecting portions, and a nano-material layer. A display region of the light transmitting substrate includes alternately distributed pixel regions and non-pixel regions. The pixel structures are in the pixel regions, each including: a first electrode close to the light transmitting substrate, a second electrode away from the light transmitting substrate, and a light emitting block between the first electrode and the second electrode. The second electrode connecting portions are located in the non-pixel regions, and connect adjacent second electrodes. The nano-material layer includes nano-island structures separated from each other, and is at least on a side of the second electrode connecting portions away from the light transmitting substrate, and is configured to excite surface plasma polaritons corresponding to infrared light and scatter the infrared light.

Apparatus, systems and methods for generating separated spin-polarized exciton-polariton quasiparticles are disclosed. Apparatus, systems and methods comprise providing a perovskite optical microcavity, incorporating liquid crystal molecules into the perovskite microcavity, and generating one or more polaritons within the microcavity by optically exciting an intersection point corresponding to a point of generation of the polaritons such that the one or more polaritons separate perpendicular to their respective propagation direction.

The application discloses a tunable one-way and two-way microwave wave trap filter and a design method, which has one-way and two-way filtering functions. The device structure mainly comprises an artificial surface plasmonic polariton planar waveguide and a yttrium iron garnet microwave resonator. Circular polarization spin polarized microwave fields with spin-momentum locking characteristics are generated at specific positions in the planar waveguide, and the magnon mode generated in the microwave resonator is spin-selectively coupled with the spin polarized microwave field. Under the critical coupling condition, the microwave input in one direction is completely filtered after the magnon, and the microwave input in the other direction is completely transmitted, so that the one-way filtering function of the microwave at a specific frequency is realized. Further loading of additional microwave resonators and through the extension of the experimental configuration, the two-way filtering function can also be realized. The application provides a more simple and flexible method to realize the multifunctional microwave wave trap filter without complex structure design and strict parameter control.

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.

The invention provides a preparation method of high-quality blue-light chiral perovskite quantum dots, and belongs to the technical field of perovskite quantum dot preparation. According to the preparation method, specific chiral ligand molecules are selected to be bonded with dangling bonds of the blue light CsPbBr3 quantum dots, and the quantum dots can be induced to generate highly asymmetric spin polaritons while surface defects of the quantum dots are passivated. The blue light chiral perovskite quantum dot prepared by the invention has the photoluminescence quantum yield of 86%, and the luminescence asymmetry factor of 0.086, and provides a solution for the preparation of a high-performance blue light circular polarization light emitting diode.

The application discloses a gallium nitride-based semiconductor laser element, which comprises, from bottom to top, a substrate, a lower confinement layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper confinement layer, and a polariton lattice layer is arranged between the upper waveguide layer and the upper confinement layer. The polariton lattice layer has a broken space inversion symmetry, forms a three-dimensional topological monopole, controls anisotropic polariton propagation, embeds a vector between an electron hole containing band on a Fermi surface, improves a motion rate of the polariton, induces asymmetric barriers at the top and the bottom of the active layer, improves a tunneling probability of a carrier, enhances a laser confinement factor and optical power, reduces dynamic conductivity caused by band transition, improves transport and injection uniformity of a hole in the active layer, suppresses generation of a non-radiative charged exciton and Auger recombination of an exciton-charge, enhances cascade conversion and spin-orbit coupling between energy bands, reduces a lasing threshold by increasing a high-energy level exciton occupation number inversion.

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.

An optical fluid sensor is disclosed, wherein the optical fluid sensor comprises, integrated into a common chip:a substrate;an optoelectronic active material stack intended to be exposed to a fluid or to an intermediate element exposed to said fluid or to said intermediate element exposed to said fluid;a polaritonic launcher to, upon illumination, launch polaritons into the optoelectronic active material stack to propagate there across; andcircuitry in electrical contact with an electrically active material structure of the stack.The optoelectronic active material stack is configured and arranged so that the polaritons optically interact with one or more molecular vibrational modes of the fluid, and the circuitry together with the electrically active material structure are configured and arranged to sense the fluid by transducing those optical interactions into an electrical signal.An optical fluid sensor arrangement, such as an array, comprising a plurality of the optical fluid sensors of the invention is also disclosed.