56 results about "Photon beam" patented technology

A fundamental new effect in nonlinear photonic systems is disclosed herein, called n-photon bound states in the continuum, which can be applied to deterministically create large Fock states, as well as very highly intensity-squeezed states of light. The effect is one in which destructive interference gives a certain quantum state of light an infinite lifetime, despite coexisting in frequency with a radiative continuum. For Kerr nonlinear systems, that state is an n-photon (Fock) state of a particular and tunable n. Experimentally-realizable examples are shown which are capable of producing n-photon Fock states, and states with very large intensity squeezing, such as greater than 10 dB. The effect requires only Kerr nonlinearity and linear frequency-dependent (non-Markovian) dissipation, and is, in principle, applicable at any frequency. The theory and concepts are also immediately applicable to nonlinear bosons besides photons, and thus may be implemented in many other disciplines.

The invention discloses a microwave photon beam forming network architecture based on a switch switching type optical adjustable true delay line and a phased array radar system thereof. According to the framework, microwave signals are modulated in an optical domain, and the characteristics of a plurality of adjustable delay paths in a single-channel switch switching type delay line are utilized, so that delay difference adjustment of multiple paths of optical signals is realized, the number of delay lines and delay units is greatly reduced, and meanwhile, high-precision and broadband beam-strabismus-free beam forming is supported; through two-stage or multi-stage delay configuration, the network can flexibly meet the broadband delay compensation requirements of different array antenna units, has low complexity and strong dynamic reconfigurable capability, is suitable for realization of a large-scale photonic integrated chip, reduces the number of delay lines by about 50%, does not generate frequency dispersion, and is suitable for large-scale photonic integrated chips. The system complexity, the cost and the power consumption can be remarkably reduced, and the method is particularly suitable for broadband phased array systems of millimeter waves, satellite communication, radar detection and the like.

The invention relates to the technical field of optical transmission communication, and particularly discloses a GHZ state analyzer for time window coding photon bits, which comprises an input port, cascaded time window photon beam splitters and the like, the first time window photon beam splitter is connected with two input ports, the other time window photon beam splitters are respectively connected with one input port, the (N-1) th time window photon beam splitter is connected with two time window photon bit X basis vector measuring devices, and the other time window photon beam splitters are respectively connected with one time window photon bit X basis vector measuring device; and determining a projection result of an input quantum state on a complete orthogonal basis vector formed by the generalized GHZ states according to a measurement result of the N time window photon bit X basis vector measurement device. According to the invention, projection measurement of the input time coding photon bit quantum state on two base vectors in the generalized GHZ state orthogonal complete base vectors is realized, and partial base GHZ state projection measurement is realized.

The present invention relates to the field of clinical radiotherapy technology, and in particular to a test system and method for the effect of an iodized oil area on photon radiotherapy dose. The system comprises: a plurality of iodized oil samples, each of which is made by mixing minced pig liver and iodized oil in different proportions; a cylindrical sample tube, each of which is composed of a plurality of detachably connected sample chambers, each of which is provided with the iodized oil samples in the sample chambers, each corresponding to the iodized oil sample. The linear accelerator irradiates an abdominal simulation phantom into which the sample tube is inserted. The CT scanner is connected to a radiotherapy planning system, which simulates the irradiation of the sample tube with a photon beam based on a CT image and obtains a simulated dose of electron density. The present application can characterize the effect of the iodized oil area on the photon radiotherapy dose by comparing the simulated dose of electron density obtained by the radiotherapy planning system with the actual dose of electron density obtained by an ionization chamber detector.

The invention discloses a multi-wavelength light-induced photoelectron charge compensation device and method for SIMS analysis, and the device comprises an adjustable wavelength light source which is used for generating light of which the wavelength is adjustable in a range from ultraviolet to visible light; the optical system is used for guiding the light generated by the adjustable wavelength light source to the surface of a sample bombarded by an SIMS primary ion beam, and ensuring that a photon beam spot is accurately overlapped with an ion beam bombarded area; and the control unit is used for dynamically adjusting the wavelength and the light intensity of the adjustable wavelength light source according to the stability of the SIMS secondary ion signal so as to optimize photoelectron emission and realize charge neutralization. The invention has the following beneficial effects: the technical scheme avoids physical damage of the electron gun to the sample and damage to the vacuum environment; the wavelength can be adjusted to cover ultraviolet light to visible light, and the device is suitable for various materials.

The invention belongs to the technical field of laser, and discloses a coherence and spectrum composite synthesis device of a two-dimensional structure, which comprises a laser sub-beam group (1), a coherence synthesis element (2), an optical conversion device (3) and a dielectric film grating (4) which are sequentially arranged along a light path direction, the laser sub-beam group (1) emits m rows * n columns of laser sub-beams to the coherent combination element (2), the laser sub-beams are combined into one row * n columns of output light beams, the output light beams are further converged to the dielectric film grating (4) through the optical conversion device (3), and finally a beam of combined light is output. According to the invention, the laser sub-beams are expanded to the arrangement of a two-dimensional structure, and a mode of coherent spectrum composite synthesis is adopted, so that compared with an existing spectrum synthesis device and method, the number of the laser sub-beams is increased, and the light beam synthesis with higher power and the miniaturization design of the synthesis device can be realized.

The invention relates to a system for converting an electron beam into a photon beam, the system comprising: an electron accelerator (1) configured to generate an electron beam (10) of accelerated electrons along an irradiation axis (Z), a scanning unit (2), a focusing unit (3) for forming a focused beam (10f) converging towards a first focus point (Fx) located on the irradiation axis (Z), a conversion unit (4) located between the focusing unit (3) and the first focus point (Fx) and comprising one or more bremsstrahlung converters (4 .1‑4.n), the one or more bremsstrahlung converters being configured to convert the focused beam (10f) into a photon beam (11x), a target holder (5h), the target holder being configured to hold a target (5), characterised in that the one or more bremsstrahlung converters (4.1‑4.n) are curved so that an intersection angle (α) at ​​which the focused beam (10f) intersects each of the one or more bremsstrahlung converters (4.1‑4.n) is between 65° and 115° at all points, preferably between 75° and 105° at all points.

The present invention provides a method for simulating laser pulse echoes from jungle targets based on KD tree acceleration, comprising the following steps: Step S1: constructing a physical model of a tree, comprising a trunk and a crown; Step S2: constructing a laser scattering model of the tree; Step S3: constructing a KD tree structure encompassing the jungle and background environment; Step S4: sampling the laser beam emitted by a laser radar (LiDAR), generating a photon beam based on its spatial energy distribution, and performing wavefront segmentation; Step S5: calculating the interaction between each photon in the photon beam generated in Step S4 and the KD tree structure generated in Step S3 to determine whether the photon hits the trunk or crown of the tree in the KD tree structure constructed in Step S3. Step S6: calculating the scattering events of the photons along the path; and Step S7: calculating the laser radar pulse echo based on the interaction between the photon beam and the KD tree structure obtained in Step S5. The present invention has the advantages of wide applicability and ease of use.

The present invention belongs to the field of quantum communication technology, and in particular relates to a correlation imaging device based on a high-order correlation light field and a control method thereof. The correlation imaging device based on a high-order correlation light field includes a correlation photon source module, a photon beam amplification module, an imaging scanning module, and a photon detection module arranged along the propagation direction of the light path; the correlation photon source module is used to generate a correlation photon source; the photon beam amplification module is used to amplify the light source generated by the correlation photon source module; the imaging scanning module is used to scan the object in front of the reflector in the reference light path along the scanning light path, and the output light path of the imaging scanning module is divided into two paths; the photon detection module is used to receive light from the imaging scanning module for coincidence measurement and counting. The present invention utilizes two-photon composite detection to restore the spatial information of the object to be measured, realizing the separation of detection and imaging. It has the characteristics of non-locality and strong anti-interference ability, and has broad application prospects.

A manufacturing method of a large-scale integrated laser ignition nuclear fusion device is characterized in that a recording machine technology is used for manufacturing equipment capable of rapidly punching holes with different angles in a large scale, the equipment is used for punching a large number of holes capable of pointing photon beams emitted by placed lasers to the same point, and the number of the holes is determined according to ignition nuclear fusion reaction requirements; the hole diameter is determined by equipment precision and ignition nuclear fusion needs.

The invention provides shale damage characteristic testing equipment and method, and relates to the technical field of geotechnical engineering.The equipment comprises a bearing platform, and a sample platform is arranged at the top of the bearing platform; the telescopic assembly is arranged above the sample table and is connected with the mechanical sensor; the scanning electron microscope assembly comprises a scanning electron microscope detector and a scanning electron microscope lens electrically connected with the scanning electron microscope detector, and the scanning electron microscope lens is arranged in the telescopic assembly; the deviating sub-scattering assembly comprises a laser, a photon beam, a transmitting mirror and a detector array, the laser and the photon beam are arranged in the telescopic assembly, and the transmitting mirror and the detector array are arranged in the bearing platform; the pressing head is arranged at the bottom end of the telescopic assembly; the scanning electron microscope detector, the laser, the telescopic assembly, the mechanical sensor and the sample table are all electrically connected with the control system. According to the method, the equipment is adopted, and the shale mechanical property and damage characteristic test can be carried out in a high-precision, lossless and efficient manner.

There is provided a lighting system for producing an output light beam irradiating plants or crops disposed in a plant growing area. The lighting system including: a circuit board having a relatively flat surface, the relatively flat surface extending along a plane, and including a first region and a second region. Solid-state light emitters are mounted in the first region and emitter drivers are mounted in the second region. The emitter drivers are substantially coplanar with the solid-state light emitters. The lighting system also includes a combining component configured to combine light sub-beams emitted by the solid-state light emitters into the output light beam, the output light beam having a combined spectral profile produced by a combination of individual spectra of the solid-state emitters.

An optical detector for quantum communication, comprising an optical setup configured to separate a single-photon signal beam encoded by a plurality of photon states into a plurality of separated single-photon beams having mutually different photon states, and a camera comprising a plurality of detection elements arranged as a two-dimensional array forming a detection area. Each detection element is configured to resolve a single photon incident on the detection element and provide a corresponding electric signal. The camera is arranged such that the separated beams are incident on mutually different designated areas of the detection area. Each designated area comprises a plurality of detection elements. Also a method for quantum communication.

The device includes a first X-ray source, configured to illuminating a measurement cell with a first beam of X photons; a first detector, placed opposite the first X-ray source along a first illumination axis; a second X-ray source, configured to illuminating the measurement cell with a second beam of X photons simultaneously with the first X-ray source; a second detector, placed opposite the second X-ray source along a second illumination axis; and a tray carrying the first X-ray source, the first detector, the second X-ray source, and the second detector, the tray being rotatable around the cell axis.

The present application belongs to the field of tumor treatment, and particularly relates to a multi-target ion and photon synchronous radiotherapy system, which comprises a rotating seat for driving the human body to rotate, an ion therapy module and a photon therapy module being arranged around the rotating seat; a release end of the ion therapy module is arranged towards the rotating seat, and the ion therapy module is used for outputting an ion beam to a drug-resistant tumor target area; meanwhile, a release end of the photon therapy module is arranged towards the rotating seat, and the photon therapy module is used for outputting a photon beam to a sensitive tumor target area; the rotating seat, the photon therapy module and the ion therapy module are respectively signal connected to a controller, and a treatment scheme planning module is signal connected to the controller. The present application provides a multi-target ion and photon synchronous radiotherapy system, and aims to solve the problem that the drug-resistant tumor area and the sensitive tumor area cannot be treated by the conventional means.

The invention belongs to the technical field of laser, and discloses a spectrum beam combining device capable of reducing the distance between adjacent laser sub-beams, which comprises a laser sub-beam dense array, a plate prism group, a convergence system and a diffraction grating, and is characterized in that laser emitted by the laser sub-beam dense array is incident on the plate prism group in parallel; after refraction deflection at different angles occurs, the laser beams are emitted in parallel after spacing reduction from the plate prism group, the laser beams enter the convergence system, and different laser beams are converged on the diffraction grating and finally are diffracted by the diffraction grating to be combined into one beam to be emitted. According to the invention, the prism group configuration with different refractive indexes is utilized, the distance between adjacent sub-beams is reduced, and the miniaturization of the spectrum beam combining device is realized; the device is simple in configuration principle, convenient to operate, high in expansibility and suitable for reducing the space between dozens of or even hundreds of paths of laser sub-beams.

The present invention provides a method of preparing a sample using a device with at least one charged particle beam, said device comprising at least one column with a charged particle source producing charged particles and with elements for forming and directing charged particles into a charged particle beam, which is connected to a chamber comprising a stage for placing at least one substrate, a manipulator for transferring the sample, a device for mounting a sample holder, a sample holder for holding the sample placed in the device for mounting the sample holder, wherein the device optionally further comprises at least one device generating a photon beam connected to the chamber, a substrate with at least one sample placed on the stage, and an evaluation unit, the method comprising the following sequentially performed steps: - obtaining an image of the manipulator using the device with at least one charged particle beam, - moving the manipulator to a distance of at least 0 μm and at most 50 μm from the sample, - creating a connection between the manipulator and the sample using material deposition or redeposition, - separating the sample from the substrate, - removing the sample from the substrate using the manipulator, - transferring the sample to a distance of at least 0 μm and at most 50 μm from the sample holder, using the manipulator, - creating a connection between the sample and the sample holder using material deposition or redeposition, - separating the manipulator from the sample using a beam of charged particles or optionally using a photon beam, characterized in that the step of separating the manipulator from the sample using a beam of charged particles or optionally a photon beam comprises the following steps: - obtaining an image of the sample connected to the manipulator using the device with at least one charged particle beam, - comparing the image of the manipulator with the image of the sample connected to the manipulator, using an evaluation unit, - determining the edge of the manipulator adjacent to the sample, using the evaluation unit, based on the result of comparing the image of the manipulator with the image of the sample connected to the manipulator, - separating the manipulator from the sample using a beam of charged particles or optionally a photon beam guided along the edge of the manipulator adjacent to the sample determined in the preceding step.

A method for aligning a pulsed laser beam in microscopy may include directing a first pulsed photon beam toward a target, directing a charged particle beam towards the target, determining a diffraction pattern resulting from an interaction of the charged particle beam with the target, directing a second pulsed photon beam towards the target, and determining a deviation of the diffraction pattern based at least in part on the second pulsed photon beam. In some embodiments, the method may include controlling, based at least in part on the deviation, a direction of pulsed photon emission by a light source, directing a third pulsed photon beam toward the target, generating detector data based at least in part on charged particles that result from a second interaction with the target and the third pulsed photon beam, and determining a position of the third pulsed photon beam, relative to the charged particle beam using the detector data.

A spectrophotometer includes a photonic source and a photonic detector, wherein a photonic beam from the photonic source is directed through an absorptive or reflective fluid of interest into a photonic detector. In the illustrative embodiment, the photonic source and the photonic detector are disposed on separate micro-platforms that are formed from the same layer of semiconductor material. The micro-platforms are suspended by nanowires that, in some embodiments, include phononic scattering elements. The phononic scattering elements increase the thermal isolation provided by the nanowires.

A microwave photon beam forming network architecture based on switch switching type optical adjustable true delay line and its phased array radar system. The architecture realizes delay difference adjustment of multiple optical signals by modulating microwave signals in the optical domain and utilizing the characteristics of multiple adjustable delay paths in a single channel switch switching type delay line, thereby supporting high precision, wideband beam forming without beam oblique view while greatly reducing the number of delay lines and delay units; through two or more levels of delay configuration, the network can flexibly meet the wideband delay compensation requirements of different array antenna units, has relatively low complexity and strong dynamic reconfigurable ability, is suitable for implementation of large-scale photon integrated chips, the number of delay lines of the application is reduced by about 50%, and no frequency dispersion is generated, which can significantly reduce the system complexity, cost and power consumption, and is especially suitable for wideband phased array systems such as millimeter wave, satellite communication and radar detection.

The application relates to the technical field of semiconductor device special equipment manufacturing, and discloses a micro-order regulation method and system based on a metastable energy window. The method emits a pulse photon beam with a specific frequency to the surface of a semiconductor target material, so that lattice atoms enter a metastable energy window; the reflection spectrum of the semiconductor target material is collected in real time during the pulse intermittent period, and lattice vibration mode features are extracted; the lattice vibration mode features are compared with preset metastable energy window boundary threshold values, the photon density and the duration of the next pulse photon beam are dynamically adjusted according to the comparison result, and lattice atoms are repaired by short-range atomic rearrangement in the metastable energy window. The scheme limits energy injection to the metastable interval, and blocks the long-range diffusion path of doped atoms.

Systems and methods for measuring an energy barrier of a transistor during fabrication of the transistor, including: determining a photocurrent of the transistor for each of a plurality of photon energies; determining an energy barrier based on a photocurrent of each of a plurality of landing energies of the charged particle beam; and determining an energy barrier of the transistor, wherein the energy barrier is a zero voltage energy barrier or a substantially near zero voltage energy barrier. The method includes irradiating the gate with a charged particle beam; irradiating the lower part of the grid electrode by using a photon beam; determining a secondary electron (SE) yield at each of the plurality of photon energies; and determining an energy barrier of the transistor.

The invention belongs to the field of tumor treatment, and particularly relates to a multi-target ion and photon synchronous radiotherapy system, which comprises a rotating seat for driving a human body to rotate, and an ion treatment module and a photon treatment module are arranged around the rotating seat; the release end of the ion treatment module is arranged towards the rotating seat, and the ion treatment module is used for outputting ion beams to the drug-resistant tumor target region; meanwhile, the release end of the photon treatment module is arranged towards the rotating seat, and the photon treatment module is used for outputting photon beams to the sensitive tumor target region; the rotating seat, the photon treatment module and the ion treatment module are in signal connection with the controller, and the controller is in signal connection with a treatment scheme planning module. The invention provides a multi-target-region ion and photon synchronous radiotherapy system, and aims to solve the problem that a conventional means cannot perform targeted treatment on a drug-resistant tumor region and a sensitive tumor region.

The application discloses a step-by-step photoetching machine, a photoetching pattern alignment device thereof and a working method. A plurality of three-dimensional marks are arranged on a wafer, which are used as coordinate presets for positioning the wafer surface; the three-dimensional marks are measured by using a needle-point sensing head sensing technology to obtain the sub-nanometer precision coordinates of the wafer surface; then the wafer workbench is moved; the new coordinates of the three-dimensional marks after the wafer workbench is moved are measured and compared with the same three-dimensional nanometer coordinates before the wafer workbench is moved to obtain the wafer area position coordinate error value. The coordinate error is compensated by moving the exposure beam generating device and the relative position of the wafer area by using the closed-loop control principle, and the relative coordinate position is re-accurately aligned. The application can be applied to the deep ultraviolet and extreme ultraviolet optical photoetching machine using a mask plate, and can also be applied to the sub-nanometer wafer area or the horizontal and vertical alignment splicing of the writing field of the electron beam / photon beam direct writing photoetching machine.

A spectrophotometer includes a photonic source and a photonic detector, wherein a photonic beam from the photonic source is directed through an absorptive or reflective fluid of interest into a photonic detector. In the illustrative embodiment, the photonic source and the photonic detector are disposed on separate micro-platforms that are formed from the same layer of semiconductor material. The micro-platforms are suspended by nanowires that, in some embodiments, include phononic scattering elements. The phononic scattering elements increase the thermal isolation provided by the nanowires.

The invention discloses an identity authentication method and system based on a quantum cryptography technology, and relates to the technical field of quantum cryptography. Specifically, an identity authentication server verifies identity information of a sending end and generates a random number; encrypting the random number through a private key and then sending to a receiving end; the receiving end verifies the random number through the public key, generates a serial number and sends the serial number to the sending end; the sending end sends the serial number to a receiving end for verification; the transmitting end signs transmission data through a post-quantum digital signature technology, encodes the transmission data in a photon beam and sends the photon beam to the receiving end; the quantum polarization state of each photon is switched along with the change of the serial number; and a receiving end decodes the coded photon beam by using the measurement basis, and obtains transmission data by using the change of the quantum polarization state. According to the invention, the quantum cryptography technology is applied to meet the data transmission of the sending end and the receiving end, and reliable three-party authentication is realized.

Systems, devices, and methods for optically stimulating optoreactive tissue samples are provided. The optical stimulation systems include coherent light sources arrayed in a housing, each coherent light source being configured to precisely focus and align a photon beam on an optoreactive tissue sample in a multi-well cartridge, delivering optical parameters that stimulate physiological responses. The systems, devices, and methods enable parallel stimulation of numerous tissue samples without crosstalk and while maintaining thermal stability, advantageously reducing data acquisition time and operator burden.

There is provided a positron source (10; 1000) for generating a positron beam (180), wherein the positron source (10; 1000) includes: a laser arrangement (50) configured to generate a pulsed beam (70) of photons; a target (30) configured to receive the beam (70) of photons, wherein the target (30) is arranged for the photons of the beam (70) to generate a photon plasma at a surface layer (40) of the target (30), wherein the surface layer (40) is configured to preferentially absorb electrons from the photon plasma to generate corresponding free positrons; and an electrode arrangement (160) comprising one or more electrodes (160A, 160B, 160C) that are configured to apply an electric field to the photon plasma to extract the free positrons therefrom and to guide the positrons to form the positron beam (180). At least the target (30) and the electrode arrangement (160) are included within a vacuum chamber (20) configured in use to provide a vacuum condition in which the target (30) and the electrode arrangement (160) are arranged to function. Optionally, the surface layer (40) is configured to include a doped semiconductor material for providing the surface layer (40). More optionally, the doped semiconductor includes at least one of: p-doped Silicon, p-doped Gallium Arsenide, p-doped Graphene, Graphene, p-doped Silicon Carbide.

A method for flexible beam blanking in ultrafast transmission charged particle microscopy may include directing, during a first time interval, a first charged particle beam and a first pulsed photon beam towards a target, generating a first image of the target based at least in part on first interactions of the first charged particle beam with the target, directing, during a second time interval, a second charged particle beam toward the target, and generating a second image of the target based at least in part on second interactions of the second charged particle beam, and generating a corrected image of the target based at least in part on the first and second image.

A system (100, 300) for adapting a diameter of a photon beam (S′, S″) comprises: a first element (1) with a curved surface which bas a first and a second focus (F1, F2). The system may be set up such that the photon beam is focused into the first focus (F1), so that the photon beam is focused onto the second focus (F2) after reflection at the surface of the first element (1).