55 results about "Airy beam" patented technology

The terahertz metasurface device comprises a top metal structure layer, a middle flexible polyimide dielectric layer and a bottom metal plate layer which are sequentially arranged from top to bottom, and the top metal structure layer, the middle flexible polyimide dielectric layer and the bottom metal plate layer form a Fabry-Perot resonant cavity. The amplitude and the phase can be regulated and controlled at the same time only by rotating the top layer metal structure of the sub-wavelength unit structure, the problems of large size, low precision and the like of an Airy beam generation device are effectively solved, and therefore flexible regulation and control of broadband (0.95-1.8 THz) one-dimensional and two-dimensional Airy beams in the terahertz wave band are achieved. And the possibility is developed for the application in high-capacity and obstacle-avoiding wireless communication.

The invention discloses a method for generating a staggered superposition double-layer Airy light beam array capable of realizing double focusing, and belongs to the technical field of structured light regulation and control and special light beam generation. Aiming at the problems that the focusing characteristics of light beam arrays in transmission in different superposition modes are difficult to fully reveal in the prior art and the generation of an optical bottle depends on complex phase modulation or multiple optical elements, the method comprises the following steps: constructing a first layer of Airy light beam array and setting regulation and control parameters, constructing a second layer of Airy light beam array with staggered azimuth angles and setting regulation and control parameters, and constructing a second layer of Airy light beam array with staggered azimuth angles; a longitudinal double-focusing structure is realized through staggered superposition of double-layer Airy light beam arrays, and a vortex phase is introduced into double-focusing array light beams to form an optical bottle structure. According to the invention, the structure is simple, the longitudinal double-focusing and optical bottle structure can be realized only through the initial light field structure design, the focusing intensity and the regulation freedom degree are high, and the application of the light beam in the related fields of microscopic imaging, particle capture and the like is expanded.

The application discloses a method for generating an ultralong focal depth array beam, and belongs to the technical field of grating manufacturing. The method comprises the following steps: constructing a Bessel beam excitation phase and a circular Airy beam excitation phase, constructing a composite phase distribution according to the array Bessel beam excitation phase and the array circular Airy beam excitation phase, and encoding the composite phase distribution to a metasurface; irradiating the metasurface with a linear polarization state plane wave, so that a left-handed circular polarization component excites an array Bessel beam, and a right-handed circular polarization component excites an array circular Airy beam; the array circular Airy beam is converted into a Bessel propagation mode after self-focusing, is spliced with the array Bessel beam in an axial direction to form a continuous light field distribution, and an ultralong focal depth array beam is obtained. The method can be applied to the fields of parallel laser processing, three-dimensional microscopic imaging and microparticle manipulation, and can extend the focal depth of the array Bessel beam while keeping the transverse resolution close to the diffraction limit.

This invention relates to the field of optical technology, and discloses a cutting system and method based on Airy beams to achieve precise positioning and flexible position switching of the cutting spot. The system includes: a laser source; a coaxial polarizer, a polarization grating rotation assembly, and a lens; the polarization grating rotation assembly includes a polarization Airy beam generator and a first polarization grating and a second polarization grating that can rotate around the optical axis respectively; and the three are in close contact to separate the incident linearly polarized light into two Airy beams based on optical axis symmetry, and the deflection direction of each outgoing Airy beam changes with the rotation of the first polarization grating and / or the second polarization grating, and each outgoing Airy beam can be regarded as the same exit point; the control host is used to position and switch the position coordinates of the focal points of each Airy beam behind the lens on the fixed focal plane by controlling the rotation angle of the first polarization grating and the second polarization grating, the fixed focal plane being perpendicular to the optical axis and having the object to be cut placed on the cutting stage.

The invention discloses an Airy beam generation method and device. The method comprises the following steps: S1, determining a working frequency and constructing the device; s2, establishing a corresponding relationship between the geometric parameters of the leaky wave unit and the leaky wave phase and amplitude; s3, solving one-dimensional Airy beam complex amplitude distribution; s4, reversely solving unit geometric parameters to realize target complex amplitude regulation and control; and S5, constructing the metasurface complex amplitude regulation and control device based on the one-way electromagnetic mode. According to the invention, the size of the metal block and the thickness of the air dielectric layer are independently regulated and controlled, so that complex amplitude regulation and control of transmission waves in a free space are realized; the metasurface device is simple and convenient in structural design, high in efficiency, easy to integrate and reconfigurable, can replace a spatial light modulator through a one-way waveguide phase regulation and control function, reduces the system cost, improves the integration level, and is suitable for on-chip integrated efficient free space wavefront control application.

The invention relates to a terahertz continuous metasurface device based on magnetic surface plasma and application thereof, the device takes a unidirectional waveguide as a substrate, the unidirectional waveguide is formed by sequentially and horizontally overlapping an electric opaque layer, a dielectric layer and a magnetized semiconductor layer from top to bottom, the thickness of the electric opaque layer is modulated through a continuous function model, and a metal sheet array is introduced into the waveguide to form the terahertz continuous metasurface device. The invention also relates to an application of the device in generating Airy beams. Terahertz unidirectional transmission based on magnetic surface plasma is supported. Phase regulation and control can be realized by adjusting the height of the metal sheet, and continuous amplitude regulation and control can be realized by continuously modulating the thickness of the radiation layer through a continuous function model. Compared with a metasurface depending on a discrete structure, the metasurface can reduce energy loss and wavefront distortion, and improve beam regulation and control precision and stability. On the basis of the characteristics, the one-dimensional finite Airy beam with self-acceleration, non-diffraction and self-healing characteristics is generated.

The utility model discloses a water guide laser processing device based on Airy beam, which comprises a mounting seat, a mounting groove is arranged in the mounting seat, a mounting plate is arranged in the mounting groove, the bottom of the mounting plate is fixedly connected with a laser cutting instrument main body, the bottom of the laser cutting instrument main body is provided with a laser cutting head, and the laser cutting head is fixedly connected with the mounting plate. A fixing assembly is arranged in the mounting base, a cooling assembly is arranged on the outer side of the mounting base, the fixing assembly and the cooling assembly are used in cooperation, avoiding grooves are formed in the two fixing grooves, and the extrusion head and the positioning rod are used in cooperation. According to the water-jet guided laser processing device based on the Airy beam, the laser cutting instrument body can be rapidly mounted and dismounted through the arranged fixing assembly, external tools are not needed in the mounting and dismounting process, the mounting steps are simple and rapid, the structure is simple, and practicability is high.

The present invention discloses an integrated and efficient device and method for generating nonlinear Airy beams, which relate to the fields of light field control and nonlinear optical technology. The nonlinear crystal of the present invention is polished and cut at a specific angle to meet phase matching conditions to achieve efficient nonlinear frequency conversion, and then a focused ion beam (FIB) is used to process a depth-gradient microstructure on its surface. When fundamental frequency Gaussian light is incident on the interior of the crystal from a non-modulated surface, efficient frequency conversion occurs, and the generated nonlinear harmonics are subjected to cubic phase modulation after passing through the depth-gradient microstructure, and then Fourier transformed through an objective lens, generating a nonlinear Airy beam in the Fourier plane of the objective lens. The structure is simple, compact, highly integrated, and has high nonlinear conversion efficiency. By designing the parameters of the cubic phase structure, any nonlinear Airy beam can be generated.

The present invention discloses an Airy two-photon microscopy imaging method and device with global enhanced aberration correction, belonging to the technical field of biological imaging. The imaging method includes the following steps: S1. Expand the laser beam through a laser beam expansion module to ensure that the laser illumination beam meets the beam size requirements for subsequent modulation; S2. Generate an Airy beam and perform wavefront correction through an AO correction module; S3. Split and combine two beams through a beam splitting and combining module; S4. Drive the beam to scan the entire sample through a beam scanning module; S5. Collect the sample signal through a fluorescence collection module. By adopting the above-mentioned Airy two-photon microscopy imaging method and device with global enhanced aberration correction, the present invention simultaneously realizes the generation of an Airy beam and real-time aberration correction through a single spatial light modulator, improves the imaging resolution of the two-photon imaging device, and helps to observe more detailed tissue information in in vivo imaging applications.

The present invention discloses a method for generating a terahertz Airy beam based on an electrically controlled liquid crystal cubic phase plate, belonging to the field of terahertz signal modulation technology, and includes the following steps: S1. calculating and manufacturing the structural electrode pattern required for the cubic phase plate; S2. photolithography of a DMSO-doped PEDOT:PSS organic thin film using a lift-off process to manufacture a structural electrode with a cubic phase pattern; S3. utilizing the structural electrode to load a vertical electric field to drive the liquid crystal to manufacture the liquid crystal cubic phase plate required for generating the Airy beam; S4. utilizing the terahertz liquid crystal cubic phase plate to achieve Airy beam generation. The present invention utilizes the aforementioned method for generating a terahertz Airy beam based on an electrically controlled liquid crystal cubic phase plate to manufacture a terahertz Airy beam generating device with a short production cycle and low cost, and exhibits excellent broadband optical anisotropy and electro-optical and magneto-optical modulation properties. It can achieve large operating bandwidth and tunable performance requirements, helping to accelerate the practical application of terahertz imaging technology.

The present application discloses a method and device for generating an Airy light needle with a long depth of focus and high aspect ratio. A linearly polarized light emitted from the laser passes through the collimated beam expanding system, and then is incident to the spatial light modulator loaded with a specific phase distribution for complex amplitude modulation. The first-order diffraction light passes through the iris and generates the modulated circular Airy beam at the back focal plane of the first 2-f lens system. The modulated circular Airy beam is focused to generate the Airy light needle with long depth of focus and high aspect ratio, which can be accurately controlled by controlling the parameters of the modulated circular Airy beams. The Airy light needle with adjustable depth of focus and aspect ratio can be applied to optical manipulation and optical imaging.

The invention belongs to the technical field of metasurfaces and plane lenses, and particularly relates to a focusing metasurface lens with an anti-shielding function, the lens is composed of 40 * 40 units with the period of 7.5 mm, each unit comprises a top layer metal annular patch, a dielectric layer and a bottom layer metal patch, the relative dielectric constant of a dielectric substrate is 2.65, and the relative dielectric constant of the dielectric substrate is 2.65. The units realize anisotropic response through circumferential notch design, a stable 180-degree phase difference is formed by adopting a mirror image inversion structure, the 1-bit phase modulation requirement is met, the array performs phase coding in the radial direction according to an Airy function, and a hollow annular layout is adopted, so that the self-bending and self-repairing characteristics of Airy beams are effectively utilized, and the phase modulation efficiency is improved. The electromagnetic wave can bypass physical shielding of an axis area, field intensity reconstruction is realized at a set focus, and the design can remarkably improve focusing gain and energy recovery capability of a system in a shielding environment while maintaining high cross polarization conversion efficiency in Ku frequency band application of 13GHz and the like.

A method of processing a transparent workpiece, comprising: directing a laser beam output by a beam source onto a phase-adjusting device such that the laser beam downstream of the phase-adjusting device is an Airy beam; and directing the Airy beam onto a surface of the transparent workpiece. The Airy beam forms an Airy beam focal region in the transparent workpiece, the Airy beam of the Airy beam focal region having a maximum intensity of 100 TW / cm 2 or less, the Airy beam of the Airy beam focal region inducing an absorption in the transparent workpiece, the induced absorption generating a bend defect in the transparent workpiece.

The present invention provides a method for generating a switchable optical ring lattice, the method comprising: preloading a preset complex amplitude mask onto a phase-type spatial light modulator, the complex amplitude mask being the complex amplitude mask corresponding to a superposition of circular Airy vortex beams with the same chirality and different topological charges; wherein a plurality of parameters of the complex amplitude mask are adjustable in real time; making a plane light wave incident on the spatial light modulator, and performing an inverse Fourier transform on the light emitted from the spatial light modulator to obtain an optical ring lattice with a chiral radial structure. The present invention utilizes complex amplitude modulation technology and digital propagation technology based on the angular spectrum theory, loads the complex amplitude mask of the superposition of circular Airy beams at a fixed plane onto the spatial light modulator, and then obtains a switchable optical ring lattice at the fixed plane through an inverse Fourier transform. The above-mentioned technology of the present invention has important value in the fields of holographic optical tweezers, laser processing, optical communication, etc.

The invention belongs to the field of ultrasonic nondestructive testing, and discloses a plane active focusing piezoelectric ultrasonic transducer based on an Airy beam structure, the plane active focusing piezoelectric ultrasonic transducer is provided with a piezoelectric plate, a matching layer, a backing, a shell and a resin gasket, the shell is internally provided with a first containing cavity and a second containing cavity which are through and communicated, the diameter of the first containing cavity is smaller than that of the second containing cavity, the backing is located in the first containing cavity, and the resin gasket is located in the second containing cavity. The cross section of the resin gasket is in an L shape, the resin gasket is located in the second containing cavity, the resin gasket is tightly attached to the shell, the piezoelectric plate is clamped at the L-shaped bending position of the resin gasket, the acoustic impedance matching layer is tightly attached to the piezoelectric plate, and the resin gasket can prevent the backing from moving towards an opening in one end of the shell. Vibration energy of the piezoelectric plate is transmitted to the backing through a hole in the center of the resin gasket, the transducer works in a thickness vibration mode, and the center frequency of the transducer ranges from 300 kHz to 5 MHz. The invention further discloses two transducers outside the center frequency. The transverse resolution of the transducer can be improved, and meanwhile, the sensitivity is improved.

The invention discloses a super lens for generating a collimated Airy beam, a light source system and an integration method of the light source system, the super lens comprises a substrate and a nano column array located on the substrate, the nano column array comprises a plurality of nano columns, and the phase of the center of each nano column meets the following conditions; wherein f is the focal length of the super lens, b1 is the attenuation coefficient of the Airy beam, lambda is the wavelength of the incident light, x is the abscissa of the center of each nano column in a rectangular coordinate system with the center of the super lens as the original point, and y is the ordinate of the center of each nano column in the rectangular coordinate system with the center of the super lens as the original point. According to the super lens, incident plane light can be shaped into a collimation Airy beam, and an optical system is greatly simplified.

A transmission device that transmits a signal to a reception device provided with a plurality of reception antennas disposed at mutually different positions, the transmission device comprising a beam generation unit that generates a plurality of airy beams and transmits transmission data using the generated plurality of airy beams, which are adjusted so that main lobes of the airy beams having properties of spatially asymmetric radio waves are directed to the positions of the mutually different reception antennas and side lobes of the airy beams are not directed to the positions of any of the reception antennas.　

The application discloses a kind of based on non-diffracting airy beam intrahepatic blood vessel three-dimensional imaging method, belong to intrahepatic blood vessel three-dimensional imaging technical field, solve the problem of insufficient accuracy and detection sensitivity of existing detection method, method includes by liver transplantation or biopsy surgery obtains liver tissue, liver tissue is fixed using 4%PFA processing, liver tissue is bleached using H2O2Solution, antigen repair is carried out to liver tissue using FLASH solution, using goat serum blocking solution to the liver tissue after antigen repair blocking treatment;Liver tissue immunostaining treatment, liver tissue dehydration treatment, based on non-diffracting airy beam and high-throughput microscope to the liver tissue after processing imaging, obtain the three-dimensional imaging picture of liver tissue;The application is immunofluorescence staining and transparent treatment to liver tissue, so that laser can smoothly penetrate tissue and carry out three-dimensional imaging, can realize single wide-range image capture.

A transmission device according to the present invention includes: a beam generation unit that generates an Airy beam having a property in which radio waves are spatially asymmetric; and a control unit that performs spatial modulation of a carrier wave by controlling a phase pattern such that spatial distribution of the Airy beam generated by the beam generation unit is different.　

The application discloses a method and system for improving the sudden self-focusing ability of a circular Airy beam, and relates to the technical field of beam transmission and control. The method comprises the following steps: determining the transmission direction of the circular Airy beam by acquiring the circular Airy beam transmitted in free space and establishing a space orthogonal coordinate system; determining the light intensity distribution of the circular Airy beam on a focal plane and an initial plane and the on-axis light field of the circular Airy beam according to the light field integral form of the circular Airy beam on any observation plane; and determining the intensity contrast according to the light intensity distribution and the on-axis light field. Under the condition of a given exponential decay factor, the dimensionless radius of the main ring in the circular Airy beam is changed, a first curve graph is drawn according to the on-axis light field, the optimal dimensionless radius is determined according to the first curve graph and the intensity contrast, and finally the strongest sudden self-focusing ability of the circular Airy beam is obtained according to the optimal dimensionless radius. The application realizes the improvement of the sudden self-focusing ability of the circular Airy beam.

The invention belongs to the technical field of electromagnetic metamaterials, and discloses a transmission metasurface antenna for generating a radially symmetric Airy and bimodal OAM composite wave beam, and the transmission metasurface is formed by rotating an upper layer metal patch and a lower layer metal patch at different positions of an array plane by a certain angle through a plurality of N-shaped geometric phase units. Phase compensation can be carried out on incident waves emitted from a feed source, and + 1 and-1 order vortex modes are respectively generated by incidence of left-handed and right-handed circularly polarized waves. According to the invention, phase modulation is carried out on the initial field distribution of the incident electromagnetic wave at the metasurface, the radial symmetric Airy wave beam with the self-focusing characteristic can be generated, spin decoupling is utilized to carry the OAM of two modes, the two OAM modes have the same divergence angle, and the method has potential application prospects in the field of large-capacity high-speed communication systems.

The present invention relates to a method for mechanically regulating calcium ion signals in nerve cells using an Airy beam-manipulated “optical bullet.” The method involves first preparing the “optical bullet” and culturing HT-22 cells. The cellular calcium ion signals are then dynamically regulated, and finally, images of the regulation process are monitored and recorded in real time using a CMOS camera. This method enables non-contact mechanical stimulation of nerve cells. It not only breaks through the spatial resolution limitations of traditional neuromodulation techniques but also provides a non-invasive, highly biocompatible means of regulating neural signals. Furthermore, combined with real-time fluorescence monitoring technology, the present invention enables intuitive assessment of regulatory effects, providing a novel tool for neuroscience research and clinical applications.

This invention relates to a broadband amplitude-coherent terahertz metasurface device, comprising a top metal structure layer, an intermediate flexible polyimide dielectric layer, and a bottom metal plate layer arranged sequentially from top to bottom. The top metal structure layer, the intermediate flexible polyimide dielectric layer, and the bottom metal plate layer form a Fabry-Perot resonator. This invention achieves simultaneous amplitude and phase modulation solely through rotating the top metal structure of the subwavelength unit structure, effectively solving the problems of large size and low precision of Airy beamforming devices. This enables flexible modulation of broadband (0.95-1.8 THz) one-dimensional and two-dimensional Airy beams in the terahertz band, opening up possibilities for its application in high-capacity, obstacle-avoiding wireless communication.

The invention relates to the field of structured light field regulation and control and anisotropic medium light propagation, and discloses a method for regulating and controlling a spin Hall effect of a circular Airy beam by using uniaxial crystal and angular modulation. The method comprises the following steps: constructing a circular Airy beam with a self-focusing characteristic; angular phase modulation is applied to the system, so that the circular symmetry of the system is broken; the modulated light beam enters a uniaxial crystal to be propagated, and due to spin-orbit coupling in the crystal, a spin Hall effect is generated: a left-handed circular polarization component and a right-handed circular polarization component are gradually separated from each other and move along the positive axis and the negative axis respectively; after a light beam is emitted out of the uniaxial crystal, two focuses which are spatially separated and opposite in spinning direction are formed on a self-focusing focal plane. The device and the method can be used for structured light beam regulation and control, spin-orbit coupling and polarized light field modulation research.

The invention provides a two-photon volume imaging device and method based on a phase regulation annular Airy beam, and belongs to the technical field of optical microscope imaging and optical control. The device comprises a laser beam expanding module, a light beam deflection module, an annular Airy beam modulation module, a light beam scanning module and an imaging module, the annular Airy beam modulation module is innovatively introduced on the basis of a traditional two-photon microscope, a spatial light modulator SLM is used for adjusting the phase, a Fourier lens is used for generating a frequency spectrum, and the imaging precision is improved. The shape of the excitation light beam at the focus is accurately regulated and controlled; the annular Airy light beam and the novel vortex annular Airy light beam are indirectly generated by using the SLM, a smaller focusing focus and a long-focus deep light needle can be generated, the imaging resolution is directly improved and the axial depth of field is expanded by improving the scanning precision of the two-photon microscope, and meanwhile, the axial change is generated on the basis of the annular Airy light needle, so that the imaging precision of the two-photon microscope is improved. And deep analysis of axial three-dimensional information is realized by fitting the shape of the light beam and the axial depth.

The invention discloses a micropore chamfer machining device and method based on an adjustable Airy beam, and belongs to the technical field of laser precision machining.The micropore chamfer machining device comprises a light source module, a beam modulation module and a beam scanning module, and the light source module is used for outputting a laser beam; the light beam modulation module comprises a liquid crystal spatial light modulator and a regulation and control assembly, the laser beam is modulated into an Airy beam through the liquid crystal spatial light modulator, and the regulation and control assembly loads different phase holograms to the liquid crystal spatial light modulator to regulate and control the Airy beam; the light beam scanning module comprises a high-speed two-dimensional scanning assembly and a bearing platform, the bearing platform is used for bearing a to-be-machined part, the Airy light beam is emitted to the to-be-machined part through the high-speed two-dimensional scanning assembly, and the high-speed two-dimensional scanning assembly is used for driving the Airy light beam to conduct scanning along a preset track so as to conduct chamfering machining on the to-be-machined part; therefore, the machining efficiency and the machining quality of the micropore chamfering can be improved.

This transmission device that communicates with a reception device comprises: a transmission antenna that is installed at a predetermined angle in the transmission device and transmits a transmission signal to the reception device; a beam generation unit that generates, for the transmission signal transmitted by the transmission antenna, a circular Airy beam so as to have a predetermined focal length; and a control unit that controls at least one of the predetermined focal length and the predetermined angle on the basis of the reception intensity of the circular Airy beam fed back from the reception device.

The present invention discloses a photoacoustic microscopy system and method based on Airy beam combined with sparse sampling, which is suitable for scenarios with large depth of field and rapid imaging monitoring. The system comprises: a beam generation module for generating a nanosecond pulsed Gaussian beam and processing it to obtain a first standard linearly polarized Gaussian beam and a second standard linearly polarized Gaussian beam; a beam shaping module for performing polarization adjustment, phase modulation, filtering, focusing and Fourier transform processing on the first standard linearly polarized Gaussian beam to obtain an Airy beam; a system control and sparse scanning module for performing two-dimensional sparse scanning sampling of an object excited by the Airy beam using a two-dimensional triangular Lissajous trajectory upon receiving the second standard linearly polarized Gaussian beam to obtain a sparse photoacoustic signal; a signal receiving and processing module for performing maximum projection based on the sparse photoacoustic signal to obtain a sparse image; and an image reconstruction module for reconstructing the sparse image using a super-resolution reconstruction network to obtain a high-resolution photoacoustic microscopy original image.

The present invention discloses a holographic vacuum optical tweezers device based on a circular Airy beam. The modulated beam generating assembly of the present invention generates a modulated beam, which is incident on a spectrometer after passing through a 4F system. The transmitted beam through the spectrometer is then reflected by a first reflector and then incident on a vacuum chamber, and then converged by a third convex lens to form a first circular Airy beam; the reflected beam through the spectrometer is reflected by a second reflector and a third reflector in turn and then incident on a vacuum chamber, and then converged by a fourth convex lens to form a second circular Airy beam. The first circular Airy beam and the second circular Airy beam are arranged opposite to each other in the vacuum chamber to form a light trap capture area. Micro-nanoparticles are captured in the light trap capture area and are stably suspended in a high vacuum environment. The present invention improves the stability of optical tweezers in capturing micro-nanoparticles in a high vacuum environment, can achieve the capture of micro-nanoparticles with larger mass, and is conducive to further improving the vacuum degree and acceleration measurement accuracy of the vacuum optical tweezers system.

The invention relates to the technical field of special combined machining, in particular to a laser electrolysis combined machining method and device based on beam shaping, and the machining method comprises the steps that laser machining parameters and electrolysis jet machining parameters in the machining device are determined according to a workpiece to be machined; the machining device is adjusted so that the output end of the machining device can be aligned with the machining area of the workpiece to be machined, the machining device is started, machining laser output by the output end of the machining device is used for irradiating the machining area so that materials in the machining area can be melted or gasified or subjected to phase change, and meanwhile the output end of the machining device sprays electrolyte to the machining area; under the action of an electric field applied by the machining device, materials in the machining area are electrolyzed and dissolved, and machining laser is a Bessel beam or an Airy beam; and when the machining area reaches the preset size and the preset precision, the machining device is stopped, and machining is completed. The machining efficiency and the machining quality can be improved at least.