18 results about "Polariton" patented technology

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 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 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 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.

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 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.

Two-dimensional (2D) crystals have renewed opportunities in artificial lattice design and assembly without the constraints of epitaxy. However, the lack of thickness control in exfoliated van der Waals (vdW) layers prevents realization of repeat units with high fidelity. Uniform, wafer-scale samples permits engineering of both electronic and optical dispersions in stacks of disparate 2D layers with multiple repeating units. Systems, methods, and devices present optical dispersion engineering in a superlattice structure including alternating layers of 2D excitonic chalcogenides and dielectric insulators. Examples demonstrate >90% narrowband absorption in <4 nm active layer excitonic absorber medium at room temperature, concurrently with enhanced photoluminescence in cm2 samples. These superlattices show evidence of strong light-matter coupling and exciton-polariton formation with geometry-tunable coupling constants. The results demonstrate proof of concept structures with engineered optical properties and pave the way for a broad class of scalable, designer optical metamaterials from atomically-thin layers.

A catalyst system includes a flow-cell cavity, a pair of spaced apart mirrors disposed in the flow-cell cavity, a nanostructured textile catalyst disposed in the flow-cell cavity between the pair of spaced apart mirrors, and an energy source configured to transmit electromagnetic radiation (EMR) waves into the flow-cell cavity between the pair of spaced apart mirrors. Also, the pair of spaced-apart mirrors are configured to trap the EMR waves such that polaritons are formed within the flow-cell cavity and a catalytic reaction of a molecule in the flow-cell cavity is altered compared to when the polaritons are not formed within the flow-cell cavity.