179 results about "Nano antenna" patented technology

An optical modulation device includes a plasmonic nano-antenna layer, a metal layer that faces the plasmonic nano-antenna layer, and a permittivity variation layer and a dielectric material layer between the plasmonic nano-antenna layer and the metal layer. An active area formed in the permittivity variation layer according to an external signal may function as a gate that controls optical modulation performance.

Provided are examples of light modulators and optical apparatuses that may include the light modulators. A light modulator may include a plasmonic nano-antenna and an element for changing plasmon resonance characteristics of the plasmonic nano-antenna. The plasmon resonance characteristics of the plasmonic nano-antenna may be changed due to a change in refractive index of the element, and thus light may be modulated.

The invention relates to an infrared spectrum enhancement and detection method and an infrared spectrum enhancement and detection device based on a graphene nano antenna. The device comprises a light source, a collimating lens, a one-point detector and an MEMS (micro-electromechanical system) grating light modulator based on the three-dimensional graphene nano antenna. Infrared light emitted from the light source is irradiated to the MEMS grating light modulator based on the three-dimensional graphene nano antenna through the collimating lens, an interference signal of the MEMS grating light modulator can be detected by the one-point detector, a detection signal is demodulated through Fourier transform, a spectrum is reproduced, and trace molecules are detected according to obtained spectrum information; the device has the advantages of good stability, high response speed, high sensitivity, dynamic tunable broadband, high enhancement factor and the like, can be expected to greatly increase the variety of substances detected by an infrared spectroscopic analysis technology and improve the detection sensitivity of the infrared spectroscopic analysis technology, and has a huge development space and a wide application prospect.

The invention discloses an efficient broadband circular polarization conversion device and method based on a meta-surface, belonging to the technical field of micro nano optical application. The efficient broadband circular polarization conversion device based on a meta-surface, which is of a composite structure, includes a nano antenna layer, an interval dielectric layer and a metal substrate layer. The nano antenna layer is used for generating a specific phase for and modulating the amplitude of incident linearly polarized light. The interval dielectric layer is used for accumulating the phase change of optical wave. The metal substrate layer is used for reflecting the optical wave propagated to the surface of the metal substrate layer to improve the overall conversion efficiency of the device. The nano antenna layer, the interval dielectric layer and the metal substrate layer constitute an optical resonant cavity. The beams propagated in the optical resonant cavity can produce a Fabry-Perot multi-beam interference effect. The invention further discloses an efficient broadband circular polarization conversion method based on a meta-surface implemented using the circular polarization conversion device. Efficient and broadband modulation of outgoing circularly polarized light is realized.

The invention relates to an arbitrary polarization dynamic control device and method based on metamaterial surface-phase change material, and belongs to the technical field of micro-nano optical applications. A metamaterial surface based on a V type nano-antenna array is used for reacting with a light field to generate a surface phase gradient, which causes that the abnormally transmitted polarized light generated under the condition of line polarized light normal incidence, deflects from the normal direction of the surface. At the same time, with the introduction of an interval modulation layer comprising periodically arrayed germanium-antimony-tellurium, under external excitation, phase differences of orthogonal polarization state emitted by different units are modulated, and overlap in space to achieve random polarization state synthesis of an outgoing light field. The method is an all-solid-state modulation method with no necessity of any mechanical modulation measures such as drawing or rotating. The separation of random polarized light and background light beams can be achieved to avoid cross fire. The method provides a flexible regulation and control measure for on-chip polarization applications of integrated optics.

A method for fabricating a nanoantenna array may include forming a resist layer on a substrate, forming a focusing layer having a dielectric microstructure array on the resist layer, diffusing light one-dimensionally in a specific direction by using a linear diffuser, forming an anisotropic pattern on the resist layer by illuminating the light diffused by the linear diffuser on the focusing layer and the resist layer, depositing a material suitable for a plasmonic resonance onto the substrate and the resist layer on which the pattern is formed, and forming a nanoantenna array on the substrate by removing the resist layer and the material deposited on the resist layer. A light diffusing angle by the linear diffuser and a size of the dielectric microstructure are determined based on an aspect ratio of the pattern to be formed.

A spatial light modulator including an electrode having a nano-antenna structure, and a display apparatus including the spatial light modulator are provided. The spatial light modulator includes a refractive index changing layer, and a pixel electrode and a common electrode which are configured to apply an electric field to the refractive index changing layer, and at least one of the pixel electrode and the common electrode include a nano-antenna pattern structure configured to resonate light.

An optical modulating device, a beam steering device, and a system employing the same are provided. The optical modulating device includes an active layer, a driver configured to electrically control a refraction index of the active layer, and a nano-antenna disposed on the active layer, and having a dual nano-antenna structure including a first nano-antenna and a second nano-antenna, the first nano-antenna having a length different from a length of the second nano-antenna, and the first nano-antenna being spaced apart from the second nano-antenna. The driver includes a first driver electrically connected to the first nano-antenna, and a second driver electrically connected to the second nano-antenna.

An ultra-thin planar device is used for arbitrary waveform formation on a micrometer scale, regardless of the incident light's polarization. Patterned perforations are made in a 30 nm-thick metal film, creating discrete phase shifts and forming a desired wavefront of cross-polarized, scattered light. The signal-to-noise ratio of these devices is at least one order of magnitude higher than current metallic nano-antenna designs. The focal length of a lens built on such principle can also be adjusted by changing the wavelength of the incident light. All proposed embodiments can be embedded, for example, on a chip or at the end of an optical fiber.

A nano RFID device or tag and method for using same are disclosed. The nano RFID device may be less than about 150 nanometers in size. The nano RFID device may be a passive, active or semi-passive nano RFID device. The nano RFID device may be distributed to a target such as a human or animal or products, for example. The nano RFID device may include a nano antenna that may comprise one or more carbon tubes. The nano RFID device may include a nano battery. The nano RFID device may include an environmentally reactive layer that reacts to its immediate environment to affix or adhere to a target. The nano RFID device may be constructed for direct or indirect distribution techniques such as by airborne techniques for inhalation, consumption distribution for ingestion, or contact distribution, for example. The nano RFID device may also be constructed to deliver, on command or other certain conditions, an effect such as a virus, compound, toxin or the like, on a target such as a terrorist, for example.

The present invention provides an optical device structure unit of visible light wave band transform and an optical device. The optical device structure unit of visible light wave band transform comprises an antenna formed by a TiO2 material, a silver mirror, and a silicon dioxide substrate, wherein an antenna structure is at a top layer, the silver mirror is in the middle, and a silicon dioxide substrate material is at the bottom, the width size a of the antenna is between 160nm and 180nm, the length size b of the antenna is between the 240nm and 370nm, the lengths and widths of the silver mirror and the silicon dioxide substrate are the same and are recorded as P, a period P=430+/-10nm, the thickness t1 of the antenna structure is 240+/-5nm, and the solver layer thickness t2 of the silver mirror is 300+/-20nm. According to the optical device, a TiO2 nano antenna is used as the basic structure unit, a metasurface sub unit perfectly realizes beam abnormal reflection at the wavelength of 632nm, and the formed optical device has a high abnormal reflection conversion efficiency.

The invention discloses a super apochromatic supersurface composite microlens, which comprises a first lens and a second lens, wherein the first lens is a positive-focal power supersurface lens with anegative dispersion property, and the particular structure is a nano-antenna array with a wide spectral response; the second lens is a positive-focal power spherical reflection microlens with a positive dispersion property, and the particular structure is a flat convex spherical microlens; the first lens comprises an upper surface and a lower surface of the nano-antenna array; the second lens comprises a second lens plane side and a second lens curved surface; the lower surface of the first lens is mutually overlapped with the plane side of the second lens; and the nano-antenna array of the first lens is embedded inside the curved surface of the second lens. The technical problems that a complex optical system is needed for chromatic aberration correction of a positive-refractive index material, and the supersurface material needs to sacrifice a bandwidth and a numerical aperture in order to correct the chromatic aberration can be solved, and the super apochromatic supersurface composite microlens has the advantages of simple structure and miniaturization.

The invention provides a medium-infrared filter based on a medium super-surface. The product comprises an array layer and a substrate layer, the array layer is a dielectric resonator array layer, andthe array layer is an array composed of a plurality of unit nano-antennas, and the array is periodically arranged in a two-dimensional lattice and has symmetry for the x-axis and the y-axis, the unitnano-antenna is a cylindrical dielectric resonator, and the thickness h of the array layer is 0.4 [mu]m to 0.5 [mu]m; the diameter of the unit nano-antenna d is smaller than the periodic lattice constant p of the base layer, and the diameter d is smaller than the wavelength corresponding to the unit nano-antenna; the base layer is a mid-infrared high-permeability medium base layer. The device works in the mid-infrared band, and the overall thickness of the system is less than the working wavelength. The device all employs medium-infrared low-loss materials, which are highly efficient. For normal incident electromagnetic waves, the reflectivity exceeds 95%; by adjusting the geometric parameters of the structure, any regulation of the operating wavelength of the device can be achieved.

The invention relates to a manufacturing method of a high-efficiency nano antenna solar battery. The manufacturing method comprises the following steps of: preparing turbid liquid from an ethanol or acetone organic solvent and nano silicon powder according to a massic volume ratio of nano silicon (g) to the organic solvent (ml) of 1:200, and spin-coating the turbid liquid onto a metal substrate for carrying out substrate modification by a spin coating method; and growing a silicon-graphite-carbon nano tube composite structure on the substrate in one step under the conditions of temperature of 800-1000 DEG C and standard pressure intensity of 40-100Pa and forming a solar battery device sheet; generating a silicon rubber or silicon carbide or alumina passivation layer among carbon nano tubes by adopting a spin coating process or sputtering or evaporating; and depositing a transparent conductive film on the upper layer of the device sheet by adopting methods, such as an electron beam evaporation method and a magnetron sputtering method, and finally obtaining the high-efficiency nano antenna solar battery by taking the metal substrate and the transparent conductive film as electrodes. The manufacturing method disclosed by the invention can be used for directly generating a nano solar battery main structure by adopting a one-step method, is simple and highly-efficient, saves raw materials and cost and is suitable for large-scale production.

An antenna system includes an elongated conductive plane and an elongated dielectric layer that is disposed on the conductive plane. An elongated graphene nanoribbon is disposed along an axis and is coupled to the dielectric layer at a graphene/dielectric interface. A feeding mechanism is coupled to the conductive plane. The feeding mechanism is configured to accept a signal that excites surface plasmon polariton waves at the graphene/dielectric interface. In a method of making a surface plasmon polariton wave antenna, an elongated conductive plane is formed. An elongated dielectric layer is applied on a surface of the conductive plane. An elongated graphene nanoribbon is applied to the dielectric layer. A signal source is coupled to the elongated conductive plane.

The invention belongs to the technical field of micro-nano photons, and particularly relates to a thin film super absorber with the low cost and a large area and a preparation method of the film. The method is based on widely used film coating and thermal annealing methods, a metal particle array or a micro-nano net structure with a controllable integral shape is prepared as a coupling micro-nano antenna of a three-layer or five-layer thin-film type artificial specific material super absorber, and the thin film super absorber is a super absorbing thin film capable of realizing operation from the visible light band to the infrared band. According to the method, an expensive and complicated electronic etching technology is eliminated, and the preparation with the large area and the low cost can be carried out. The technology is simple in operation, and can be compatible with various substrates, and has a wide commercial prospect in the fields of solar energy collection, heat energy circulation, photochemical catalyst reinforcement, thin-film photoelectronic devices.

A tag-along microsensor device comprises a means for transmitting a signal, adhesion means, and sensing means. In a preferred embodiment, a means for transmitting a signal includes a nano-antenna apparatus. Adhesion means may include mechanical, magnetic, or static electric adhesion means. Mechanical adhesion means may include a hook or barb, or a chemical adhesion means such as glue or other sticky chemical adhesive. Sensing means may include sensing of audio signals, accelerometers, gyros, or other sensors. Alternatively, a tag-along microsensor method includes the steps of deploying a tag-along microsensor, transmitting a signal from a tag-along microsensor, receiving a signal, and acting on a signal. In a preferred embodiment, transmitting a signal includes the steps of charging a first conducting surface with respect to a second conducting surface, and discharging a first conducting surface with respect to a second conducting surface, so that the discharging forms a substantially continuous closed conducting shell from a first conducting surface and a second conducting surface. In other embodiments, deploying a tag-along microsensor results in a tag-along microsensor adhering to an entity such as a person, vehicle, or animal. In still further embodiments, receiving a signal may involve receiving a signal is in the vicinity of a location where a tag-along microsensor was deployed or at a location a substantial distance from where said tag-along microsensor was deployed. Acting on a signal may include recording data from a signal or intercepting an entity to which a tag-along microsensor is attached.