124 results about "Metallic grating" patented technology

This invention relates to a high efficiency solar cell comprising: (a) a top surface of an anti-reflective coating layer; (b) an engineered photonic crystal material layer, (c) an active photovoltaic layer; (d) a photonic crystals with an integrated diffraction grating; (e) a metallic diffraction grating reflective layer, and (f) a metallic back reflector;

• • whereby normally incident light striking the surface of the solar cell passes through the anti-reflective coating and the engineered photonic crystal material layer and is absorbed by active photovoltaic layer thereby generating electrical energy and obliquely incident light is reflected and diffracted by the engineered photonic crystal material layer, the one dimensional photonic crystal layer, the metallic grating reflective layer and the metallic back reflector to the active photovoltaic layer thereby generating electrical energy.

The present invention provides a liquid crystal display device, which includes a liquid crystal panel (1) and a collimated exit light backlight module (3). The liquid crystal panel (1) includes a CF substrate (11), an array substrate (13), and a liquid crystal layer (12). The CF substrate (11) has an upper surface on which an upper polarizer film (15) is arranged. The array substrate (13) has a lower surface on which a lower polarizer film (17) is arranged. The upper polarizer film (15) includes a view angle diffusion film (19) arranged thereon. The collimated exit light backlight module (3) includes two backlight sources (31), a metallic grating reflector plate (33), a wire grid polarizer (35), and an optic film assembly (37). The two backlight sources (31), the metallic grating reflector plate (33), and the wire grid polarizer (35) collectively define a light guide chamber (39). The liquid crystal display device greatly improves light transmittance and light extraction efficiency and also effectively overcomes the issue of color deviation at a large view angle.

A surface reflection type phase grating 21 in which first metal film 23 is formed on a substrate 22, metal gratings 24 of a rectangular cross-sectional shape having a thickness d for which first-order diffraction becomes maximum by second metal film 24 formed of a material differing from that of the first metal film 23 is formed thereon, and transparent dielectric film 26 formed of SiO₂ is further formed on the surfaces of the metal gratings 24 and the first metal film 23 exposed among them, and a displacement measuring apparatus adopting the surface reflection type phase grating.

A direct backlight module is disclosed, and includes: a substrate having a driving circuit layer; multiple blue LED chips disposed on the substrate, and the multiple blue LED chips are electrically connected to the driving circuit layer; an optical conversion layer covered on the multiple blue LED chips, wherein the optical conversion layer includes a colloidal material, multiple phosphor particles and multiple haze particles disposed in the colloidal material, the optical conversion layer converts a blue light emitted from the multiple blue LED chips into a white light; and a transparent dielectric layer and a metal grating layer sequentially formed on the optical conversion layer. A liquid crystal display device is also disclosed. The direct backlight module can reduce the thickness of the liquid crystal device, which is beneficial to realize a thin and narrow-frame liquid crystal display device.

The present invention provides a liquid crystal display device, which includes a liquid crystal panel (1) and a collimated exit light backlight module (3). The liquid crystal panel (1) includes a CF substrate (11), an array substrate (13), and a liquid crystal layer (12). The CF substrate (11) has an upper surface on which an upper polarizer film (15) is arranged. The array substrate (13) has a lower surface on which a lower polarizer film (17) is arranged. The upper polarizer film (15) includes a view angle diffusion film (19) arranged thereon. The collimated exit light backlight module (3) includes two backlight sources (31), a metallic grating reflector plate (33), a reflective polarizing beam splitter (35), and an optic film assembly (37). The two backlight sources (31), the metallic grating reflector plate (33), and the reflective polarizing beam splitter (35) collectively define a light guide chamber (39). The liquid crystal display device greatly improves light transmittance and light extraction efficiency and also effectively overcomes the issue of color deviation at a large view angle.

The invention discloses a metal grating coupling SPR (Surface Plasmon Resonance) detection chip and a manufacturing method thereof. The detection chip comprises a transparent substrate, a metal grating coupling layer formed on the substrate, and a microfluid layer covered on the metal grating coupling layer. The manufacturing method comprises the following steps: applying a laser hologram photoetching process to form strip gratings on photoresist uniformly coated on the surface of the substrate, forming a metal film by a metal film coating process, further stripping the photoresist to obtain a metal grating coupling layer, and bonding the prepared microfluid layer and the metal grating coupling layer to obtain a target product. According to the invention, the laser hologram photoetching process is applied in the SPR detection chip, and in a grating manufacturing process, rapid and large-area exposure is available to obtain periodic striped patterns, i.e. one-dimensional gratings, so the process time and cost are greatly reduced, which is conductive to industrialized mass production.

The invention provides a sensing element and a device thereof for determining the value of gas refractive index, and the sensing element is characterized by comprising a laser, an optical fiber, a detection cavity, a metal grating and a spectrum analyzer. A light source emitted from the laser is coupled in the optical fiber, is led in the detection cavity, and is subjected to beam expansion by a beam expander to reach the metal grating via an optical path, and then reflects on the metal grating surface; and the reflecting light is coupled in the optical fiber by a coupler and is led into the spectrum analyzer. The gas sensing device designed by the invention is characterized by high measurement precision, safe application, real-time detection and remote transmission, small volume of sensing parts, integratability and no need of power supply.

The invention belongs to the technical field of photoelectric sensing and provides an embedded grating structure-based narrow-band near-infrared thermo-electronic photoelectric detector. The inventionaims to solve the problem of the low responsivity of a photoelectric detector in the prior art. The embedded grating structure-based narrow-band near-infrared thermo-electronic photoelectric detectorcomprises a silicon substrate and a metal grating, a titanium film is arranged between the metal grating and the silicon substrate so as to serve as an adhesive layer; the metal grating is connectedto a top conductive electrode; and a bottom conductive electrode is arranged on a silicon back surface. The metal grating is embedded into the silicon substrate, so that the light absorption efficiency of metal and the generation rate of hot electrons are improved, and the thermalization loss of the hot electrons is reduced; a Schottky interface on the side surface of the grating is additionally adopted, so that the collection efficiency of the hot electrons transferred into silicon is improved, and therefore, the responsivity of the photoelectric detector is improved; and the response wavelength of the detector can be changed by adjusting the period of the metal grating, so that the wavelength-adjustable near-infrared photoelectric detector is achieved.

The present invention relates to a strong distributed feedback semiconductor laser. More specifically, the invention implements a top optical waveguide (2) for semiconductor lasers having a surface metallic grating (5) making it possible to obtain a stable and controlled distributed feedback, using a simple and robust technology. In the inventive laser, which comprises an active area (1) having an effective refractive index (neff) in which a light wave is propagated with a wavelength (λ), the top waveguide (2) is made of a weakly-doped material and the periodic grating (5) depth (p) is

plus or minus 50%, the low precision needed being one of the advantages of the inventive laser.

The invention discloses a blue light band asymmetric metamaterial polarization modulator. A second metal grating layer is prepared on the top surface of a silicon-based layer through an electron beamevaporation deposition method and an electron beam etching process; a second low-refractive-index dielectric material layer is prepared on the top surface of the second metal grating layer through anelectron beam evaporation deposition method; a graphical high-refractive-index dielectric material polarization conversion layer is prepared on the top surface of the second low-refractive-index dielectric material layer through an electron beam evaporation deposition method and an electron beam etching process; a first low-refractive-index dielectric material layer is formed on the top surface ofthe patterned high-refractive-index dielectric material polarization conversion layer through an electron beam evaporation deposition method, and a first metal grating layer is formed on the top surface of the first low-refractive-index dielectric material layer through the electron beam evaporation deposition method and an electron beam etching process; according to the invention, the problems of low transmissivity and low polarization conversion rate can be solved, and the device can also realize a bidirectional asymmetric transmission function.

The invention discloses a method for preparing metal nano stripes. The method comprises the following steps that a target material is disposed in a way that a target surface of the target material and a surface of a horizontal substrate form an angle theta; the surface of the horizontal substrate is bombarded vertically by ion beams from an ion beam gun in at least one inert gas as working gas; the target material is bombarded by ion beams from ion beam gun in a way that the ion beams and the normal of the target surface of the target material form an angle theta; the substrate is bombarded by ion beams reflected by the target surface in a way that the reflected ion beams and the normal of the substrate form an angle of 180 degree to 2-theta and simultaneously, the substrate moves horizontally; and when the previous step is finished, metal nano stripes are obtained, wherein the target material has a rectangular structure and surfaces of the target material are smooth. The method for preparing self-assembled metal micro-nano stripes has the advantages of low cost, good controllability and feasibility of industrialization, and can be utilized for the fields of productions of metal grating polarizers, nonlinear optical devices, plasma photonic chips, LED luminous efficiency reinforced metal gratings and micro-nano magnetic structures.

The invention discloses a super-absorption structure based on black phosphorus nano-strip arrays and a metal grating slit. The super-absorption structure comprises a metal reflecting layer, a dielectric layer, black phosphorus nano-strip arrays and a metal grating slit structure. The metal reflecting layer is made of an Al material; the dielectric layer is made of a SiO2 material; the black phosphorus nano-strip arrays are distributed on the dielectric layer at intervals, and the number of black phosphorus layers is a single number; a metal grating slit structure is formed by the distance between a left metal grating and a right metal grating, and the metal gratings are made of a Au material. Surface plasmon polariton waves can be restrained by modulating an absorption curve through structural parameters, and the light absorption of black phosphorus under a mid-infrared band is enhanced through a light transmission enhancement effect generated by the metal grating slit structure and alocal surface plasmon resonance (LSPR) effect generated by the black phosphorus nanostrip arrays. Therefore, the application of BP-based plasmon in photoelectric detection and sensing in a mid-infrared region is paved.

A method of manufacturing a nano metal grating is provided. In the method, a patterned metal oxide film is formed on a surface of the metal layer through the formation of metal oxides in an oxygen ashing process, and the nano metal grating is manufactured by using the patterned metal oxide film as a mask. Thus, a drawback that the metal layer cannot be etched after the metal layer is oxidized is solved, and the metal oxide film is not only used as a mask to manufacture the nano metal grating, but the metal oxide film is also used as a protective layer of the nano metal grating.