6 results about "Hyperbolic metamaterials" patented technology

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 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.

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 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.

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).