121 results about "Metallic grating" patented technology

In a hybrid-type polarizer having a reflective-type polarizing filter and a color filter, a method of manufacturing the hybrid-type polarizer and a display device having the hybrid-type polarizer, the hybrid-type polarizer includes a base member and a polarizing color filter member. The polarizing color filter member includes a plurality of metal gratings in a plurality of regions of the base member. The metal gratings in the regions have different sizes from each other. Each of the metal gratings transmits a first portion of an incident light and reflects a second portion of the incident light. The invention improves image display quality and lowers the manufacturing cost.

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.

A display device for driving liquid drops to move on the basis of an electrowetting effect is characterized by comprising a lower substrate, an electrode plate, a nano-metal grating, a plurality of liquid drops, a super-hydrophobic coating layer, a dielectric layer, an electrode array and an upper substrate in sequence from bottom to top. A cofferdam is added on the periphery between the upper substrate and the lower substrate to form a sealed chamber, the chamber is filled with a second fluid insoluble with the liquid drops, and the single liquid drops in a chamber between the electrode array and the electrode plate which are parallel to each other at least cover two adjacent electrodes of the electrode array. The characteristic that the nano-metal grating is extremely sensitive to changes of the refractive index of an adjacent material is utilized, color filtering is finished by changing the material refractive index, active modulation of transmission and reflection spectrums of the nano-metal grating is achieved, and simultaneously due to the hydrophobic characteristic of the nano-metal grating structure, the electrowetting display modulation contrast and speed can be improved.

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.

There is set forth herein in one embodiment, a structure including a metallic grating having a grating pattern, the metallic grating including a critical dimension. The metallic grating can output a spectral profile when exposed to electromagnetic radiation, the spectral profile having a feature. The grating pattern can be configured so that a change of the critical dimension produces a shift in a value of the feature of the spectral profile. A method can include propagating input electromagnetic radiation onto a metallic grating having a two dimensional periodic grating pattern and measuring a critical dimension of the metallic grating using output electromagnetic radiation from the metallic grating.

The invention relates to the technical field of terahertz, in particular to a closed periodic metal grating SSP terahertz filter and a tuning method. The terahertz filter comprises a metal cover plateand a periodic metal grating of a rectangular structure, wherein the metal cover plate is a flat plate with constant thickness and is arranged right above the periodic metal grating in parallel at aninterval, and the height of the metal cover plate can be flexibly set according to the central frequency and the bandwidth of a stop band of the terahertz filter. Compared with the prior art, the closed periodic metal grating SSP terahertz filter provided by the invention can realize tuning of SSP mode transmission characteristics on the surface of the periodic metal grating only by changing theheight of the metal cover plate, and has the advantages of simple and compact structure and dynamic tunability.

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.

A method and a system for the enhancement of the sensitivity in surface plasmon resonance (SPR) sensors based metallic grating by exploiting the conical configuration is presented. We consider the propagation of surface plasmon polaritons (SPPs) excited by light from the visible to infrared spectrum range, incident on a plasmonic grating at different directions by varying both the zenith and azimuthal angles. For specific azimuthal angles, SPPs propagate in the grating plane perpendicular to the incident light momentum. This is the condition that allows increasing the number of different excited SPPs modes largely. We exploit this effect to increase the sensor sensitivity with the change of refractive index of thin film on the plasmonic grating surface. Polarization effects also contribute to a further modes enhancement and increase the sensitivity. A scheme for a lab-on-chip implementation of a system that allows a parallel detection in microfluidic channels has been shown.

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.

The invention belongs to the field of optical devices. In order to improve the modulation depth and bandwidth of the modulator, the invention provides a broadband transmission type infrared light modulator based on graphene plasmas. The infrared light modulator comprises a substrate, the substrate is covered with a graphene modulation layer, the modulation layer is provided with a non-metal grating layer through coating-etching, the non-metal grating layer is provided with a metal grating layer through coating, and the two sides of the substrate are provided with a first electrode and a secondelectrode through coating respectively. Graphene is coupled with a non-metal grating layer; the excellent polarization characteristic of the metal grating and the field constraint capability for further enhancing the graphene local surface plasmon polariton are utilized; the structure has strong reflection on TE linear polarization incident light, transmission modulation with high modulation depth in a broadband range can be realized on TM linear polarization incident light, and the characteristic can realize a modulation function with high modulation depth and wide modulation bandwidth on transmission light when natural light is incident.

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.