42 results about "Nano antenna" patented technology

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 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.

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.

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.

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.

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.

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.

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 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.

The invention discloses a visible light polarization insensitive super lens based on all media. The super lens is composed of a medium substrate and a plurality of nanometer antennas. All the nanometer antennas are arranged in a central symmetry type regular matrix with one point of the dielectric substrate as the center, and the center is the center of the super lens. And each nano antenna is a cylinder of which the upper surface is a plane and the lower surface is a hemispherical surface. Each nano antenna is vertically arranged on the dielectric substrate, and the hemispherical surface of the lower part of each nano antenna is embedded into the upper part of the dielectric substrate. According to the invention, the super lens with the hemispherical cylindrical embedded nano unit array as the core is adopted, and the design that the hemispherical structure at the bottom of the nano antenna is embedded into the dielectric substrate is adopted, so that the depth-to-width ratio of the super lens is reduced, and the coupling effect of the nano antenna and light waves is enhanced.

The utility model discloses medical imaging equipment based on terahertz, and the imaging equipment comprises a terahertz radiation module which generates broadband high-intensity terahertz waves based on the nonlinear optical effect of a nanometer antenna array, and is used for irradiating a detection body within the range of the terahertz waves; the terahertz wave band composite FSS band-pass filter is arranged between the terahertz radiation module and the detection body and is used for gating terahertz waves; the detection module is used for receiving terahertz waves carrying optical information of a detection body; and the image processing module is electrically connected with the detection module and is used for carrying out digital image processing on the terahertz waves carrying the optical information of the detection body to obtain a terahertz medical image of the detection body. Therefore, three-dimensional real-time non-destructive living medical imaging and objective case detection can be realized.

The utility model discloses a nanometer injection molding mobile phone middle frame antenna groove structure which comprises a mobile phone middle frame, an antenna groove is arranged at the upper end of the mobile phone middle frame, a nanometer antenna is arranged in the antenna groove in an injection molding mode, a vertically-arranged circular vertically-pulling rubber groove is arranged at the side end of the antenna groove, and the vertically-pulling rubber groove is arranged at the upper end of the mobile phone middle frame. The middle position of the vertical pulling glue groove is provided with an arc-shaped transverse pulling glue groove which is horizontally arranged, the upper end of the nanometer antenna is provided with vertical pulling glue which is correspondingly matched with the vertical pulling glue groove, and the upper end of the nanometer antenna is provided with transverse pulling glue which is correspondingly matched with the transverse pulling glue groove. The utility model has the advantages that the design is novel, the structure is simple, the binding force of the nano antenna groove is effectively improved, the probability of acid spitting and whitening after oxidation is reduced, and the reworking and scrapping cost caused by acid spitting and whitening after oxidation in the manufacturing process is effectively saved.

An optical modulation device and an optical device including the same are disclosed. The disclosed optical modulation device comprises an optical modulation element that changes the propagation direction of incident light having a fixed angle of incidence by utilizing the apparent displacement of a meta-grating formed by a driving signal applied to a plurality of nano-antennas. The steered light is emitted by an emission optical system. The emission optical system emits first-order diffracted light by the meta-grating.

The present disclosure generally relates to methods of sequencing nucleic acid molecules, such as DNA, more particularly single DNA molecules, using polymerases located within electric field enhanced regions. The present disclosure also relates to plasma nanoantennas useful in nucleic acid sequencing, methods of making the nanoantennas, arrays comprising the nanoantennas, and methods of using the nanoantennas and arrays in single molecule sequencing techniques.

This invention discloses a semiclassical modeling method and system for electromagnetic-quantum coupling of nanoantennas, belonging to the field of multiphysics coupling solutions. The modeling method includes: establishing classical electromagnetic model equations and hydrodynamic model equations respectively, and coupling them together through the continuity of the fields to obtain the basic equations of semiclassical hydrodynamics; solving the basic equations of semiclassical hydrodynamics using the finite element method to obtain the electric field and current density; using the electric field and current density for iterative solution to update the coupling terms and obtain the electric field distribution of the nanoparticles, thereby obtaining the optical properties of the nanoantenna; thus achieving a balance between classical electromagnetic field theory and quantum mechanical effects, suitable for the analysis of various nanoantenna structures with moderate computational accuracy requirements; solving the problem that classical electromagnetic field theory cannot well explain and describe small-sized metal nanoantenna structures, and avoiding large-scale calculations using all-quantum methods.

The invention belongs to the technical field of single molecule detection and nano biosensing, and particularly provides a molecular structure change detection system and method based on photo-electric time sequence regulation, and the system comprises a solid nanopore which is used for forming a to-be-detected molecule passing channel; the silicon carbide light-emitting device is used for generating an adjustable pulse light signal; the gold nano antenna array is used for gathering the adjustable pulse optical signals and generating a local plasmon resonance field in a nano orifice area; the electrode assembly is used for applying an adjustable bias electric field and detecting an ion current pulse signal caused by the change of the molecular structure to be detected; the time sequence control module is used for forming a photoelectric time interlocking identification window in a solid nanopore area; and the signal acquisition and analysis module is used for completing molecular structure change detection based on the identification window. Recognizable current pulse characteristics can be generated through the system for reaction processes accompanying local dipole moment, space structure or electronic state changes, and dynamic monitoring and accurate distinguishing of a single molecule level are achieved.

The invention relates to the technical field of quantum chips, and discloses a micro-nano antenna design method for electron or hole spin driving, a micro-nano antenna and a system.The micro-nano antenna design method for electron or hole spin driving comprises the steps that first-class antenna parameters are determined based on magnetic field driving, determining a second type of antenna parameters based on electric field driving; a first antenna is designed according to the first type of antenna parameters, a second antenna is designed according to the second type of antenna parameters, and the first antenna and the second antenna are used for being arranged on different chips or integrated on the same chip; and performing a simulation test on the first antenna and the second antenna to obtain an output result, and if the output result meets a preset requirement, completing the design of the first antenna and the second antenna. According to the invention, the driving efficiency can be improved so as to meet the requirements of a semiconductor quantum chip on high-fidelity single-bit gate operation.

The invention discloses a transmission-type optical phased array light beam scanning chip and combination. The chip comprises a transparent substrate, a dielectric wrapping layer, a transparent electrode, an electrically adjustable filling material, a metal electrode and a top capping dielectric layer. The dielectric wrapping layer, the transparent electrode and the electrically-adjustable filling material jointly form a dynamic grating structure, and the transparent electrode and the metal electrode are used for applying an electric field to the electrically-adjustable filling material to change the refractive index of the electrically-adjustable filling material, so that the phase retardation of incident light in each nano antenna unit is adjusted, and light beam scanning output is realized. The depth-to-width ratio of the nano antenna unit is larger than 10, and the grating period is smaller than the wavelength of working light waves, so that an enough phase modulation range is guaranteed to be obtained. The device can realize high-speed phase modulation of incident light, has low insertion loss and high response speed, overcomes the defects of slow response and large loss of traditional mechanical scanning and a liquid crystal phased array, and is suitable for application scenes needing rapid light beam scanning, such as laser radar, optical communication, micro projection and the like.

To provide an image sensor and an electronic device in order to increase photosensitivity, improve utilization of light incident on the image sensor, and reduce crosstalk of a band tube.SOLUTION: The image sensor includes at least one photosensitive pixel, and each photosensitive pixel includes a plurality of nano-antenna layers 201. The plurality of nano-antenna layers are arranged in an overlapping manner. Each of the nano antenna layers may include at least one nano antenna 2011. The at least one nano-antenna generates resonance for incident light. Different nano-antenna layers generate resonances for different bands or different polarization directions of incident light. An output signal of the nano antenna layer may be used to obtain an image.SELECTED DRAWING: Figure 3

A wavelength conversion device comprises a flat, plate-shaped phosphor part and a plurality of nanoantennas. The flat, plate-shaped phosphor part contains a phosphor that is excited by excitation light to produce fluorescence. The plurality of nanoantennas are arranged to form a grid-like array pattern in each of a plurality of regions on a surface of the phosphor part, as viewed from a top-down perspective perpendicular to that surface. The plurality of nanoantennas are made of a metallic or dielectric material. The array pattern of the plurality of nanoantennas in one region is a pattern obtained by rotating an array pattern of the plurality of nanoantennas in another region about an axis perpendicular to that surface.

The present invention comprises: a flat phosphor portion comprising a phosphor; a dielectric multilayer film formed on one surface of the phosphor portion and configured to reflect a fluorescence component in a wavelength range that is a part of the wavelength range of fluorescence emitted by the phosphor; and a plurality of nano antennas, the plurality of nano antennas being periodically disposed on the dielectric multilayer film.

A wavelength conversion device includes a flat plate-shaped phosphor portion, a first nanoantenna group, a translucent body portion, and a second nanoantenna group. The flat plate-shaped phosphor portion includes a phosphor to be excited by an excitation light to emit a fluorescence. The first nanoantenna group is provided at a lower surface side of the phosphor portion and includes a plurality of first metal nanoantennas arranged at a first pitch. The translucent body portion is filled between adjacent first nanoantennas, formed on the lower surface of the phosphor portion to cover the lower surface of the phosphor portion, and made of a translucent material. The second nanoantenna group is provided on an upper surface of the phosphor portion and includes a plurality of second metal nanoantennas arranged at a second pitch on the upper surface of the phosphor portion.