17 results about "Hyperbolic metamaterials" patented technology

This invention relates to a dual-mode singularity sensing system based on phase jump, comprising a sensing module composed of alternating layers of hyperbolic metamaterials and isotropic first dielectric layers. The sensing module exhibits a continuous-domain bound-state phenomenon when incident light propagates, and this continuous-domain bound-state phenomenon includes the ability to split into a pair of reflecting phase singularities with opposite topological charges. This invention extends singularity sensing technology from single-mode to dual-mode, enabling independent two-step measurements and exhibiting higher robustness to environmental perturbations.

A hyperbolic metamaterial is provided. The hyperbolic metamaterial includes a substrate and sub-wavelength nanostructures arrayed on the substrate. Each sub-wavelength nanostructure has a decreasing cross-sectional area with increasing height from the substrate and includes dielectric or semi-metallic material layers and metal-insulator transition (MIT) material layers respectively interleaved with the dielectric or semi-metallic material layers. Each MIT material layer and each dielectric or semi-metallic material layer of each sub- wavelength nanostructure has a cross-sectional shape characterized in that current is induced in one or both of the dielectric or semi-metallic material layers and the MIT material layers by exposure to a magnetic field.

The invention discloses a nanowire hyperbolic metamaterial-based QBIC (Quantum Balanced Integrated Circuit) super-structure surface, which belongs to the field of optical super-structure surfaces and comprises a substrate and a dielectric layer on the substrate, and a metal nanowire array is vertically embedded into the dielectric layer to form a metamaterial; the method comprises the following steps of: photoetching the metamaterial in a partial region to form two cylinders with the same height, namely a dimer cell, and photoetching the metamaterial in the rest partial region according to a mode that a plurality of dimer cells are periodically arranged to form a QBIC (Quadrature Balanced Integrated Circuit) metasurface based on the nanowire hyperbolic metamaterial. The refractive index is accurately adjusted by adjusting the size, spacing and material characteristics of dimer cells and the arrangement mode of a periodic array, a QBIC structure with a high Q value and high sensitivity is designed, and the QBIC structure has wide application prospects in the aspects of high-sensitivity sensing, quantum optics, nonlinear enhancement, low-loss lasers and the like.

The present invention discloses a thermophotovoltaic device based on a hyperbolic metamaterial nanowire array and a manufacturing method thereof, which can significantly improve the thermoelectric conversion performance. The present invention comprises the following steps: 1) determining the filling rate of the hyperbolic nanowire array according to the radiant heat flux and the limitation of the nanowire structure parameters; 2) designing the structural dimensions of the nanowire array according to the process limitation; 3) constructing a near-field thermophotovoltaic device according to the optimized structural parameters; 4) obtaining the thermoelectric conversion power performance of the near-field thermophotovoltaic device based on the hyperbolic metamaterial by using finite element analysis. The present invention combines the hyperbolic nanowire array structure with the near-field thermophotovoltaic device, and regulates the frequency of the radiant thermal photons through parameter optimization to match the band gap width of the semiconductor of the battery layer. The nanowire array structure can effectively improve the absorption capacity of the thermal photons. The present invention is compatible with the existing semiconductor manufacturing processes and has broad applications in aspects such as the recovery and utilization of industrial waste heat.

The invention provides an application of a hyperbolic metamaterial based on a graphene-superconductor in a temperature sensor, and belongs to the technical field of temperature sensors. The hyperbolic superconducting material is a hyperbolic metamaterial with a periodic structure formed by alternately arranging graphene and superconductors; in a low-temperature environment, after light waves are incident to the hyperbolic superconducting material by adjusting the Fermi level of the graphene, the number of layers of the graphene, the thickness of the superconductor and the environment temperature, large Goos-Hanchen (Goos-# imgabs0 #: GH) displacement is achieved near a phase transformation point from elliptic dispersion to hyperbolic dispersion, and the hyperbolic superconducting material is obtained. The corresponding relation between the GH displacement in the hyperbolic metamaterial and the environment temperature is applied to the low-temperature temperature sensor.

The present application relates to a near-field radiation heat transfer system filled with artificial hyperbolic metamaterials. The system comprises an emitter, a receiver and a filling medium, the filling medium is arranged between the emitter and the receiver; the filling medium is provided with artificial hyperbolic metamaterials, the artificial hyperbolic metamaterials are potassium permeated silicon dioxide nano-porous matrix filling materials; wherein, the system adopts a full-coupling multi-physical field framework integrating near-field radiation, conduction transmission and nonlinear temperature stratification. The present application adopts potassium permeated silicon dioxide nano-porous matrix filling materials as hyperbolic low-loss gap filling medium, and establishes a full-coupling multi-physical field framework integrating near-field radiation, conduction transmission and nonlinear temperature stratification, and realizes near-field radiation dominated heat transfer in a solid-state system and exceeds the conduction heat flow.

This invention relates to the fields of electromagnetic shielding and micro / nano photonics, and discloses a near-field shield based on layered hyperbolic metamaterials and its fabrication method. The shield is constructed by stacking a substrate, a layered hyperbolic metamaterial, and a capping layer sequentially from bottom to top. The layered hyperbolic metamaterial is composed of alternating metal and dielectric layers, with each functional layer having a subwavelength thickness. The capping layer is located on the outermost side to provide impedance matching and physical protection. In this subwavelength layered structure, utilizing its unique hyperbolic dispersion characteristics in the operating wavelength band, external near-field evanescent waves can be efficiently coupled into volume modes within the structure, and absorbed and dissipated through the ohmic loss of the metal layers, thereby blocking electromagnetic energy penetration towards the substrate. This invention features a compact structure and process compatibility, effectively solving the problem of near-field signal crosstalk between adjacent components in high-density optoelectronic integrated circuits, and has significant application value in the electromagnetic compatibility design of on-chip optical interconnects and nanophotonic devices.

An OLED is disclosed that includes an enhancement layer having optically active metamaterials, or hyperbolic metamaterials, which transfer radiative energy from the organic emissive material to a non-radiative mode, wherein the enhancement layer is disposed over the organic emissive layer opposite from the first electrode, and is positioned no more than a threshold distance away from the organic emissive layer, wherein the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer, and the threshold distance is where the total non-radiative decay rate constant is equal to the total radiative decay rate constant; and an outcoupling layer disposed over the enhancement layer, wherein the outcoupling layer scatters radiative energy from the enhancement layer to free space.

The invention provides a display device for improving light extraction efficiency and a preparation method thereof, and belongs to the technical field of photoelectron manufacturing. The display device comprises a light-emitting block, a flat layer, a metal electrode layer and a hyperbolic metamaterial layer, the light-emitting block is located on the surface of the metal electrode layer, the flat layer is located on the surface of the metal electrode layer and covers the light-emitting block, and the hyperbolic metamaterial layer is located on the flat layer and covers the light-emitting block. The orthographic projection of the light-emitting block on the surface of the metal electrode layer is located in the orthographic projection of the hyperbolic metamaterial layer on the surface of the metal electrode layer; the hyperbolic metamaterial layer comprises a plurality of hafnium dioxide layers and a plurality of zirconium dioxide layers which are alternately stacked. According to the embodiment of the invention, evanescent waves formed by total internal reflection can be collected, and the light extraction efficiency of the display device is improved.

This invention discloses a QBIC metasurface based on nanowire hyperbolic metamaterials, belonging to the field of optical metasurfaces. It includes a substrate and a dielectric layer on the substrate. A metal nanowire array is vertically embedded into the dielectric layer to form the metamaterial. First, a portion of the metamaterial is photolithographically formed into two cylinders of uniform height, constituting a dimer cell. The remaining portion of the metamaterial is then photolithographically formed by periodically arranging several dimer cells to create the QBIC metasurface based on nanowire hyperbolic metamaterials. This invention precisely adjusts the refractive index by modifying the size, spacing, material properties, and periodic array arrangement of the dimer cells, designing a QBIC structure that combines high Q-value and high sensitivity. It has broad application prospects in high-sensitivity sensing, quantum optics, nonlinear enhancement, low-loss lasers, and many other fields.

The invention relates to a near-field radiant heat transfer system filled with artificial hyperbolic metamaterials. The system comprises an emitter, a receiver and a filling medium, wherein the filling medium is arranged between the emitter and the receiver; the filling medium is provided with an artificial hyperbolic metamaterial, and the artificial hyperbolic metamaterial is a potassium permeable silicon dioxide nano porous matrix filling material; the system adopts a fully-coupled multi-physical field framework integrating near-field radiation, conduction transmission and nonlinear temperature stratification. According to the invention, a potassium-permeable silicon dioxide nano-porous matrix filling material is used as a hyperbolic low-loss gap filling medium, and a fully-coupled multi-physical field framework integrating near-field radiation, conduction transmission and nonlinear temperature stratification is established, so that heat transfer dominated by near-field radiation and heat flow exceeding conduction are realized in a solid-state system.

The utility model provides a Goos-Hanchen displacement sensor based on a graphene-dielectric hyperbolic metamaterial, and belongs to the technical field of optical sensors. Graphene sheets and dielectric sheets are alternately arranged to form a periodic photonic crystal structure, and in a near-infrared band, for a given incident wavelength, in a photonic crystal composed of graphene and a dielectric, a dispersion space presents a hyperbolic dispersion characteristic by modulating the Fermi level of electrons in the graphene. Furthermore, by changing the Fermi level, the number of layers of the graphene and the thickness of the medium, large GH displacement can be achieved at the phase change position from hyperbolic dispersion to elliptic dispersion, and the maximum GH displacement reaches up to 300 times of incident wavelength. GH displacement is very sensitive to wavelength response, and based on the effect, a hyperbolic metamaterial high-sensitivity dielectric thickness and light wave incident angle sensor is provided.

A hyperbolic metamaterial is provided. The hyperbolic metamaterial includes a substrate and sub-wavelength nanostructures arrayed on the substrate. Each sub-wavelength nanostructure has a decreasing cross-sectional area with increasing height from the substrate and includes dielectric or semi-metallic material layers and metal-insulator transition (MIT) material layers respectively interleaved with the dielectric or semi-metallic material layers. Each MIT material layer and each dielectric or semi-metallic material layer of each sub-wavelength nanostructure has a cross-sectional shape characterized in that current is induced in one or both of the dielectric or semi-metallic material layers and the MIT material layers by exposure to a magnetic field.

The invention provides a hyperbolic metamaterial based on aperiodic graphene-dielectric and application of the hyperbolic metamaterial, and belongs to the technical field of optical sensors. The graphene single layer A and the dielectric layer B form a hyperbolic metamaterial heterostructure according to the rule of a cantor sequence; incident light is emitted to the surface layer plane of the hyperbolic metamaterial heterostructure, and for a given incident wavelength, the dispersion space of the hyperbolic metamaterial heterostructure shows hyperbolic dispersion characteristics related to the weight occupied by the dielectric thickness by modulating the Fermi level of graphene; by adjusting the Fermi level, the relaxation time, the number of layers and the thickness of a dielectric medium of the graphene single layer A, the phase of a reflection coefficient changes greatly near a phase change point from hyperbolic dispersion to elliptic dispersion, so that huge GH displacement is realized at a resonance angle, and the angle displacement sensor utilizes the corresponding relation between the GH displacement and an incident angle.

The application relates to biomedical optical imaging technology and discloses a combined imaging system based on single-turntable microscopy and near-field enhancement of metamaterials, which comprises an excitation light beam light source modulation module for outputting uniform light spots; the excitation light beam is incident to a single-turntable platform through a polarization matching module and a dichroic mirror; a pinhole is uniformly distributed along a plurality of Archimedes spiral lines on the single-turntable platform; the laser beam transmitted through the pinhole on the single-turntable platform is sequentially converged on a sample table through a cylindrical mirror, a first galvanometer, a second galvanometer and an objective lens to excite a sample to generate fluorescence; the generated fluorescence returns to the dichroic mirror along the original path and is received by the imaging module; the single-turntable platform is arranged in the conjugate plane of the objective lens; and a layered double-hyperbolic metamaterial film is arranged on the surface of the sample table. The application can significantly improve the spatial resolution to about 80 nm while maintaining the millisecond-level high frame rate.

The application discloses a high-sensitivity Goos-shift gas sensor based on a subwavelength hyperbolic material and a preparation method. The application is based on a hyperbolic metamaterial composed of silver and titanium dioxide, obtains the intensity and direction characteristics of the Goos-shift on the surface of the hyperbolic metamaterial, directly changes the direction of the G-H shift by adjusting the incident wavelength in addition to enhancing the intensity of the G-H shift, and simultaneously, according to the critical wavelength characteristics, the critical wavelength is blue-shifted (red-shifted) with the increase (decrease) of the filling factor and the background dielectric constant. In combination with the intensity and direction characteristics of the Goos-shift, helium is filled at the background medium in the incident area, and a gas sensor with a sensitivity as high as 1.59*10 9 nm / RIU is designed, so that the air quality detection is facilitated.

A high effective refractive index structure may include one or more high effective refractive index materials disposed on a substrate. The high effective refractive index structure configured to respond to a light received at the high effective refractive index structure by at least generating one or more sub-diffraction limit illumination patterns for illuminating a specimen while one or more frames are captured of the illuminated specimen. The one or more sub-diffraction limit illumination patterns may include one or more speckle patterns. The one or more high effective refractive index materials may exhibit an effective refractive index equal to or greater than 3. Examples of high effective refractive index materials include hyperbolic metamaterial (HMM) multilayers, nanowire based hyperbolic metamaterials, and organic hyperbolic materials (OHM).