63 results about "Nano antenna" patented technology

The compact reconfigurable polarization converter is characterized in that the compact reconfigurable polarization converter comprises a ridge-type silicon waveguide, and the upper surface of the ridge part of the ridge-type silicon waveguide is provided with a periodic sub-wavelength nano grating structure which is used for regulating and controlling the effective refractive index of transverse electric wave and transverse magnetic wave modes and has an inclination angle; the nanometer grating structure is made of Sb2Sb3 or Sb2S3 phase change materials, the nanometer grating structure is composed of a plurality of nanometer antennas which are the same in size and shape and parallel to one another, gaps of the nanometer grating structure are filled with SiO2 materials, an Al2O layer and a graphene heating layer are sequentially arranged on the upper surface of the nanometer grating structure and the upper surface of the SiO2 filling materials from bottom to top, and the graphene heating layer is arranged on the lower surface of the nanometer grating structure. And metal electrode palladium gold is arranged on the upper surface of the graphene heating layer and located on the two sides of the flat plate part of the ridge-type silicon waveguide. The device has the advantages that the function is reconfigurable, the size is smaller, the broadband is wider, and the power consumption is lower.

The multi-phase metasurface holography method based on frequency and polarization decoupling belongs to the field of micro-nano holography. It includes the following steps: generating random phase holograms, multiplying them by a factor K to obtain n different K-fold phase holograms, calculating the mean square error of the output image and label, optimizing the phase of the random phase holograms using an adaptive moment estimation algorithm, multiplying the obtained basic phase by n factors K to obtain n optimized multi-phases, and matching the optimized multi-phases with frequency λ1 and a cross-circular polarization channel to obtain a phase φ; scanning the length and width of each nano-antenna column in the cross-circular polarization channel and the linear polarization channel with frequency λ2 to determine the complex amplitude modulation characteristics of the nano-antenna columns for different frequencies and polarizations, obtaining the corresponding phase distribution. This design of multi-phase metasurface holography based on frequency and polarization decoupling can improve energy conversion efficiency, and different combinations of polarization and frequency also enhance the flexibility of multi-phase holographic modulation.

This invention discloses a tunable nanoantenna and its fabrication method, belonging to the field of nanoantenna technology. The tunable nanoantenna comprises, from top to bottom: an ordered metal mesh nanoelectrode layer, Fe... 3 O 4 The invention comprises a magnetic nanosphere layer, a silicon nanopillar micro / nanostructure layer, a substrate layer, and a lower electrode layer. This invention proposes a tunable nanoantenna and its fabrication method. Specifically, this invention combines silicon nanopillars with Fe... 3 O 4 By combining magnetic nanospheres and utilizing their synergistic effect, a composite nanoantenna with magnetic response and optical resonance characteristics can be constructed. This not only breaks through the limitations of single-material control, but also enables more flexible performance control through the dual effects of magnetic and optical fields.

The invention discloses a full-space switchable nanoimprint and holographic display method based on a metasurface, and belongs to the field of micro-nano optics and holographic display. According to the metasurface-based full-space switchable nanoimprint and holographic display method, the metasurface used for achieving full-space switchable nanoimprint and holographic display is composed of nano antennas of different geometric dimensions, and the geometric dimensions and the arrangement mode of the metasurface are determined through an amplitude constrained phase holographic optimization algorithm; the amplitude distribution of the light field passing through the metasurface is restrained into binary image distribution in a real space, and holographic reconstruction is carried out in a wave vector k space. According to the sensitivity of the metasurface to the wavelength of incident light, three different optical modulation modes are realized under three wavelengths; the wavelength sensitivity of the metasurface is utilized to modulate a reflected light beam and a transmitted light beam under different incident light wavelengths, so that full-space switchable nanoimprint and holographic display are realized, and the metasurface can be applied to the fields of optical nanoimprint, counterfeiting prevention, optical switches, optical communication, display and the like.

A wavelength conversion device includes a phosphor member and a plurality of nanoantennas. The phosphor member has one surface on which an excitation light is incident, includes a phosphor excited by the excitation light to emit a fluorescence, and has an uneven structure on another surface in an opposite side of the one surface. The uneven structure includes a plurality of projecting portions each provided in one direction along the other surface at a pitch smaller than a peak wavelength of the fluorescence. The plurality of nanoantennas are provided at upper surfaces of the plurality of projecting portions and made of a metal material.

The invention provides a gas sensor comprising an optically transparent substrate (100); an array of nanoantennae (200) being disposed on the optically transparent substrate (100); and a metal-organic framework hybridised with a polymer being integrated into the gas sensor; wherein the nanoantennae (200) are configured as dark-bright mode coupling antennae with one or more nanogaps being formed adjacent to one or more hotspots of the nanoantennae (200) in bright mode.

The invention discloses a spectrum sensor based on an ultra-narrow band surface outer surface lattice resonance mode and application thereof.The spectrum sensor comprises a substrate, a dielectric grating located on the upper surface of the substrate and a V-shaped metal nanometer antenna array covering the upper surface of the dielectric grating, the top end of the dielectric grating is triangular, and the top end of the dielectric grating is triangular. A metal nano antenna in the V-shaped metal nano antenna array is of an asymmetric V-shaped structure with two arms different in length, coherent coupling between out-of-plane dipoles in the V-shaped metal nano antenna array finally forms an out-of-plane SLR mode, and the spectrum sensor based on the ultra-narrow-band out-of-plane SLR mode is high in quality factor and wide in application prospect.

The purpose of the present invention is to provide: a wavelength conversion member with which a lighting device having a narrow-angle light distribution, high output, and low color unevenness can be configured; and a lighting device using the same.　This wavelength conversion member is characterized by comprising a flat plate-shaped phosphor member including a phosphor that is excited by excitation light to emit fluorescence, a reflection member that is provided on a side surface of the phosphor member and reflects the excitation light and the fluorescence, and a plurality of nanoantennas that are provided on one main surface of the phosphor member and comprise a metallic material or a dielectric material, wherein: the plurality of nanoantennas include a first nanoantenna group arranged in a lattice shape with a first arrangement period and a second nanoantenna group arranged in a lattice shape with a second arrangement period, the first arrangement period being a period corresponding to a first wavelength included in the wavelength range of the excitation light and the fluorescence, the second arrangement period being a period corresponding to a second wavelength included in the wavelength range of the excitation light and the fluorescence; in terms of the intensity ratio of light emitted in a predetermined angular range around a direction perpendicular to the main surface from a first region where the first nanoantenna group is formed in the phosphor member, light of the first wavelength is greater than light of the second wavelength; and in terms of the intensity ratio of light emitted in a predetermined angular range around a direction perpendicular to the main surface from a second region where the second nanoantenna group is formed in the phosphor member, light of the second wavelength is greater than light of the first wavelength.

To provide a two-dimensional photonic integrated circuit optical phased array for imaging systems.SOLUTION: Aspects of the disclosure provide a device and a method for capturing one or more images using a photonic integrated circuit (PIC) optical phased array (OPA) based imaging system. The method may include processing the environmentally or artificially lit received image using one or more injected control wavelengths or wavefronts to enable electronic control of functions such as real time color filtering, glint removal or other intensity image manipulation, image stabilization, collection of multiple images for panoramic composites, focal plane adjustment and / or other image optimization manipulations based on user input. These system level functions may be accomplished with a device utilizing a plurality of optical nano-antenna elements, a plurality of phase and amplitude modulators, a plurality of measurement photodiodes and a plurality of other associated photonic constructs along with one or more CMOS processors to process the received image.SELECTED DRAWING: Figure 6

We utilize high-quality-factor (high-Q) metasurfaces patterned either in or adjacent to electro-optical or thermo-optical materials such as lithium niobate, barium titanate, or thermally-sensitive polymers. The metasurface includes nanoantennas that act as dipole emitters; the particular structure and arrangement of nanoantennas can steer light to particular directions or focus light, The electromagnetic metasurface supports one or more guided mode resonances. The metasurface also includes a perturbation superposed on the metasurface features and configured to couple free-space radiation to the guided mode resonances.

The application belongs to the technical field of single molecule detection and nanobiological sensing, and specifically provides a molecular structure change detection system and method based on photoelectric time sequence regulation, which comprises: a solid-state nanopore for forming a channel through which a to-be-detected molecule passes; a silicon carbide light-emitting device for generating an adjustable pulsed light signal; a gold nanoantenna array for gathering the adjustable pulsed light signal and generating a local plasmonic resonance field in a nanopore region; an electrode assembly for applying an adjustable bias electric field and detecting an ion current pulse signal caused by a to-be-detected molecular structure change; a time sequence control module for forming a photoelectric time interlocking identification window in the solid-state nanopore region; and a signal acquisition and analysis module for completing molecular structure change detection based on the identification window. Any reaction process accompanied by local dipole moment, spatial structure or electronic state change can generate identifiable current pulse characteristics through the system of the application, so that dynamic monitoring and accurate discrimination at a single molecule level can be realized.

Plasmonic biosensor device comprising a first and second electrode, a charge carrier tunnelling junction for providing charge carriers for generating electroluminescent light emission, that is in electrical connection with the first and second electrodes for application of a voltage potential difference. The second electrode comprises or forms a plasmonic structure including a plurality of optical nanoantennas or a plurality of electrically interconnected optical nanoantennas configured to generate plasmons and light emission via the charge carriers provided by charge carrier tunneling in the charge carrier tunnelling junction. The plurality of optical nanoantennas extend thereon.

A light-emitting device includes: a semiconductor light-emitting structure layer configured to have a photonic crystal layer; and a nanoantenna phosphor configured to be placed on an emission surface of the semiconductor light-emitting structure layer and to include a wavelength converter configured to convert a wavelength of light emitted from the semiconductor light-emitting structure layer to generate wavelength-converted light and an antenna array configured to have a plurality of nanoantennas periodically arranged on the wavelength converter.

In exemplary aspects, oligonucleotides are synthesized via a microfluidic reaction chamber integrating nanostructure / high-Q dielectric nanoantenna arrays of a metasurface device, the arrays providing synthesis sites. The method comprises; the chamber processing input reagents for producing oligonucleotides at outlets of the chamber; and optically exciting the synthesis sites by altering optical parameter(s) to cause at least one enzymatic synthesis cycle. In more specific examples, the method further includes effecting, after the cycle(s) occurs, PCR amplification of certain of the synthesized products by selecting and optically exciting one or more of the synthesis sites, and / or microfluidically segregating the one or more synthesized products, in response to the amplification step, into homogenous oligo pools.

Aspects of the disclosure provide a device and method for capturing one or more images using a photonic integrated circuit (PIC) optical phased array (OPA) based imaging system. The method may include processing the environmentally or artificially-lit received image using one or more injected control wavelengths or wavefronts to enable electronic control of functionality such as real time color filtering, glint removal or other intensity image manipulation, image stabilization, collection of multiple images for panoramic composites, focal plane adjustment and / or other image optimization manipulations based on user inputs. These system level functionalities may be accomplished with a device utilizing a plurality of optical nano-antenna elements, plurality of phase and amplitude modulators, plurality of measurement photodiodes and plurality of other associated photonic constructs along with one or more CMOS processors to process the received image.

The invention discloses a tunable nano antenna and a preparation method thereof, and belongs to the technical field of nano antennae, and the tunable nano antenna sequentially comprises an ordered metal mesh nano electrode layer, a Fe3O4 magnetic nano sphere layer, a silicon nano column micro-nano structure layer, a substrate layer and a lower electrode layer from top to bottom. The invention provides a tunable nano antenna and a preparation method thereof. According to the preparation method, the silicon nanorods and the Fe3O4 magnetic nanospheres are combined, and the composite nano antenna with magnetic response and optical resonance characteristics is constructed by utilizing the synergistic effect of the silicon nanorods and the Fe3O4 magnetic nanospheres, so that the limitation of regulation and control of a single material can be broken through, and more flexible performance regulation and control can be realized through the dual effects of a magnetic field and a light field.

A nanostructured substrate is provided for use in connection with analyzing a biological material in an optical detection system. Nanostructures imprinted in an optic support substrate are configured as a nanoantennae array for supporting fluorescence-based assays involving the detection and characterization of target analytes of a biological material, where each nanoantenna includes a conically-formed cavity and a conformal shell of high refractive index medium supporting an interior volume of the cavity that behaves as a single mode resonator to promote strong resonant field coupling between optical modes of the nanoantenna and a resident fluorescent species under excitation.

The present invention relates to a multiple beam redirection device comprising plasmonic optical nanoantennas comprising M>=2 plasmonic nanoantennas located at a distance from each other. Each nanoantenna is formed by a row of N plasmonic nanostructures, the angle θi of each nanoantenna with respect to an axis being coplanar to the nanoantenna and to the propagation vector of the electromagnetic field and perpendicular to the latter, wherein λi is a beam wavelength and D is the distance between nanostructures of a nanoantenna.

The application relates to an optical nano antenna, in particular to a multi-wavelength one-way scattering optical nano antenna based on a gallium phosphide arrowhead type, wherein the multi-wavelength one-way scattering optical nano antenna is an arrowhead type nano antenna, the material of the arrowhead type nano antenna is gallium phosphide, the included angle a of the arrowhead type nano antenna is 15 DEG, the length of two sides of the arrowhead G is 303 nm, the width of the arrow tail M is 40 nm, the length of the arrow tail L is 100 nm, the thickness H of the arrowhead type nano antenna is 420 nm, the background refractive index of the arrowhead type nano antenna is a constant 1, the incident light of the arrowhead type nano antenna is a plane wave, the wave vector is parallel to the z-axis direction, and the polarization is parallel to the x-axis direction. The nano antenna is composed of the arrowhead type of the high-refractive-index material gallium phosphide, under the excitation of the incident plane wave, the wave vector is parallel to the z-axis direction, and the polarization is parallel to the x-axis direction. The structure is a structure capable of supporting electric resonance and magnetic resonance.

Aspects of the disclosure provide a device and method for capturing one or more images using a photonic integrated circuit (PIC) optical phased array (OPA) based imaging system. The method may include processing the environmentally or artificially-lit received image using one or more injected control wavelengths or wavefronts to enable electronic control of functionality such as real time color filtering, glint removal or other intensity image manipulation, image stabilization, collection of multiple images for panoramic composites, focal plane adjustment and / or other image optimization manipulations based on user inputs. These system level functionalities may be accomplished with a device utilizing a plurality of optical nano-antenna elements, plurality of phase and amplitude modulators, plurality of measurement photodiodes and plurality of other associated photonic constructs along with one or more CMOS processors to process the received image.

The invention belongs to the technical field of terahertz, and particularly relates to a tunable terahertz generation method based on a physical driving generative adversarial network and a topological metasurface, and the method comprises the steps: constructing a heterogeneous integrated topological metasurface unit comprising thin-film lithium niobate, an arrayed nano antenna, tungsten disulfide and a graphene layer; a physical driving generative adversarial network is utilized, Maxwell equation set constraints are introduced into a loss function, and a topological structure sequence meeting wave vector matching conditions is reversely designed; infrared laser is adopted as a pumping source, a difference frequency generation effect is utilized to excite the metasurface, and a continuous domain bound state effect is combined to enhance the local field intensity, so that high-power and continuously adjustable-frequency terahertz waves are generated. The terahertz full-band high-efficiency conversion and ultra-fast dynamic tuning are realized, the output power and the light beam quality are remarkably improved, and the physical feasibility of a design result is ensured.

The present invention relates to a single photon light source capable of generating single photons with a high repetition rate and a high collection efficiency by positioning an emitter in a nanogap of a nano-antenna including a metal nanoparticle and a metal layer, and by controlling Purcell enhancement in the nanogap. The single photon light source of the present invention is easy to manufacture with low manufacturing costs due to its simple structure and has excellent light collection efficiency by emitting single photons vertically upward through an optical antenna structure of a nano-antenna. In addition, single photons may be generated by applying various emitters to a nano-antenna, a high production yield is obtained due to the wide bandwidth, and operation may be possible at room temperature at various wavelengths.

The present application relates to a kind of color router for photon momentum manipulation and its preparation method.Color router is composed of metal nano antenna, carbon nanotube film, printed circuit board.When the edge of metal nano antenna is excited by electron beam, the green light and red light components emitted in far field are distributed along different propagation directions, while the impact position is located in the center, then non-splitting pattern is generated.In addition, the conversion of characteristic radiation direction can be triggered by controlling the electron beam excitation position.By adjusting the excitation position, the far-field interference of dipole moment and quadrupole moment can be changed, and the active modulation of dichromatic photon splitting can be effectively realized.The present application provides a convincing platform for manipulating photon momentum on nanoscale, and paves the way for future quantum information technology and integrated photonic systems.

The present invention relates to the field of optics, and discloses an optical acquisition system based on material structure and its application. An optical acquisition system based on material structure includes a three-dimensional object, a metasurface, a camera array, a filter, and a slide rail. The metasurface is parallel to the camera array plane, and the distance between the metasurface and the camera array cannot exceed 1 cm. It is divided into different sub-regions according to the camera position. The nanoantennas in each sub-region are designed for phase distribution according to the camera position. The area of ​​the region should be greater than or equal to the camera lens, and the nanoantennas in different sub-regions cannot intersect. The advantage of the present invention is that a layer of two-dimensional metasurface is introduced in front of the camera array plane. It is small and thin, which not only realizes the projection of orthogonal perspectives at corresponding positions, but also does not significantly increase the complexity of the optical system. It can be freely designed according to the complexity of the acquisition scene, and has great flexibility.

To provide a wavelength conversion member having narrow-angle light distribution, high output, and color unevenness, and a lighting device using the same.SOLUTION: The light emitting device includes a plate-shaped phosphor member including a phosphor that is excited by excitation light to emit fluorescence, a reflective member provided on a side surface of the phosphor member and configured to reflect the excitation light and the fluorescence, and a plurality of nano-antennas 37A, 37B, and 37C provided on one principal surface of the phosphor member and made of a metallic material or a dielectric material, wherein the plurality of nano-antennas include a first nano-antenna group arranged in a lattice pattern at a first arrangement period and a second nano-antenna group arranged in a lattice pattern at a second arrangement period. The first array period is a period corresponding to a first wavelength included in the wavelength range of the excitation light and the fluorescence, and the second array period is a period corresponding to a second wavelength included in the wavelength range of the excitation light and the fluorescence.SELECTED DRAWING: Figure 1

Concepts directed to multi-modal bio-interfacing devices and methods for fabricating and implementing the same are described. In one example, a device for bio-interfacing applications includes a multi-modal bio-interfacing structure formed on a substrate. The multi-modal bio-interfacing structure includes a microelectrode pad formed on the substrate and a micropillar electrode extending from the microelectrode pad. The multi-modal bio-interfacing structure further includes a plurality of nanoantennas formed on the micropillar electrode.

The present disclosure provides pixel units and manufacturing methods thereof. An example pixel unit includes a substrate, a nano antenna and a first electrode connected to the nano antenna that are formed on the substrate, a light-emitting layer formed on the nano antenna and the first electrode, and a second electrode formed on the light-emitting layer.

The invention discloses an electromagnetic-quantum coupling semi-classical modeling method and system for a nano antenna, and belongs to the field of multi-physics field coupling solution. The modeling method comprises the following steps: respectively establishing a classic electromagnetic model equation and a fluid dynamic model equation, and simultaneously obtaining a semi-classic fluid dynamic basic equation through field continuity coupling; solving the semi-classical hydrodynamic basic equation by adopting a finite element method to obtain an electric field and current density; performing iterative solution by using the electric field and the current density, updating the coupling term, obtaining the electric field distribution of the nano particles, and further obtaining the optical characteristics of the nano antenna; therefore, the balance between the classical electromagnetic field theory and the quantum mechanical effect is realized, and the method is suitable for analyzing various nano antenna structures with medium calculation precision requirements; the problem that the classical electromagnetic field theory cannot well explain and describe the small-size metal nano antenna structure is solved, and large-scale calculation using a full-quantum method is avoided.

The present invention relates to a single-photon light source in which a light emitter is positioned in a nanogap of a nanoantenna including metal nanoparticles and a metal layer, and a single photon having a high repetition rate and a high light concentration rate is generated by adjusting the Pelsel enhancement of the nanogap. The single-photon light source is simple in structure, easy to prepare and low in preparation cost, and the single photons are emitted vertically upwards through the optical antenna structure of the nanometer antenna, so that the single-photon light source has the advantage of being excellent in light condensation rate. In addition, a single photon can be generated by applying various illuminants to the nano antenna, and the nano antenna has the advantages of wide bandwidth, high yield, capability of operating at various wavelengths at room temperature, and the like.

A surface coating for enhancing UV sterilization and a method for manufacturing the surface coating are disclosed. The surface coating is configured to locally enhance the UV light intensity of UV light incident on the surface coating. The surface coating includes a dielectric layer, a conductive layer located on the dielectric layer, a series of nano-openings located in the dielectric layer and the conductive layer, a series of nano-antennas located in the series of nano-openings, and a dielectric gap located between the series of nano-antennas and the conductive layer. The conductive layer and the nano-antennas both include a UV plasma material.