30results about How to "Breaking through the diffraction limit" patented technology

The invention discloses a nanometer optical tweezers device and method for accurately controlling nanoparticles and biomolecules. The device includes a microscope, a microflow channel is arranged on an objective table of the microscope, the microflow channel comprises cover glass and a glass slide, two optical fibers are arranged in the microflow channel and are sleeved by glass capillaries, the glass capillaries are fixed on adjustable optical fiber adjusting frames, the other end of one of the optical fibers is connected with a Y type optical fiber coupler, two other arms of the Y type optical fiber coupler are connected with a band-pass filter and a fiber laser, the other end of the band-pass filter is connected with a photoelectric detector, and the other end of the other optical fiber is connected with a laser. The method includes the following specific steps: 1. preparing a parabola-shaped optical fiber tip used for accurate control; 2. fixing a micro lens on the optical fiber tip; 3. using the micro lens assembled in the Step 2 to capture and control fluorescent nanoparticles; and 4. capturing and controlling DNA molecules.

The invention discloses a laser ablation processing method for quartz crystal. The laser ablation processing method specifically comprises the steps of selecting lasers, preparing control software, designing processing drawings, carrying out laser ablation, carrying out post-processing treatment and carrying out detection. The method for processing the quartz crystal is designed on the basis of limitation to the condition of each step, the quartz crystal can be effectively processed for forming various shapes and can be thinned through the processing method, the thickness of the thinned quartz crystal is small, the corresponding base frequency is high, and the strength of the processed quartz crystal is high. In addition, the processing method is simple, the processing accuracy is high, and the processing dimensional accuracy of the quartz crystal can be controlled to be within the range of + / - 5 micrometers.

The invention discloses a large view field super resolution imaging device which comprises a base and a super-surface, wherein the base and the super-surface are successively arranged in the bottom-up sequence. The super-surface is composed of nano-unit structure arrays which are arranged in succession on an ultra-thin metal or a dielectric film. A nano-unit structure is a deep sub-wavelength structure. According to the invention, geometric phase on the nanostructure is used to control the electromagnetic wave symmetry; electromagnetic waves are converted from rotation symmetry to translational symmetry to acquire large view field perfect focusing near 180 degrees; if curved face or multi-plane combination is used, large view field imaging can be realized; the work bandwidth can cover the entire electromagnetic spectrum; the resolution is close to or even beyond the diffraction limit; and the device has a wide application prospect in the field of large view field super resolution imaging.

The invention relates to a variable-period grating photonic crystal super-resolution imager. There is a gap of the same width between the incident surface of the crystal and the exit surface of the photonic crystal. The equivalent refractive index of the photonic crystal is -1. The number of columns, the point light source enters the photonic crystal after passing through the sub-wavelength grating, and realizes super-resolution imaging that breaks through the diffraction limit. By adding a sub-wavelength grating on the surface of the photonic crystal, the coupling effect of the light field is enhanced, the half-width of the image point is compressed, the imaging resolution is improved and the diffraction limit is broken.

The present invention provides a multi-mode excitation structure based on a simple resonant cavity, including a metal layer, a resonant cavity, an input channel and an output channel, the resonant cavity, the input channel and the output channel are located in the metal layer, the input channel and the The output channel is filled with air, the resonant cavity is filled with air or other refractive index materials, the resonant cavity is rectangular in shape, the input end of the input channel is open, the output end of the output channel is open, and the input The upper end of the channel is aligned with the upper end of the resonant cavity for upper end coupling, and the output channel and the resonant cavity are coupled in one of the following three ways: upper end coupling; lower end coupling; bottom end coupling. The structure is based on the MIM waveguide, which has strong field confinement ability and can break through the diffraction limit; it does not need to increase the number of resonant cavities to achieve multi-mode excitation in the cavity, which simplifies the structure, and has a wide range of optional wavelengths and is easy to adjust.

A super-resolution imaging method and a system thereof are disclosed. The method comprises the following steps S1 an aperture size of an imaging system is adjusted; S2 corresponding images under different apertures are collected, and an image sequence is obtained; S3 a series of intensity-aperture data for pixels at a location in the image sequence is subjected to curve fitting operation, and a fitted intensity-aperture curve is obtained; S4 according to the obtained fitted curve, an intensity corresponding to an extrapolated aperture exceeding an actual maximum aperture of the imaging systemis extrapolated; S5 all pixels in the image sequence are extrapolated to an intensity of the same extrapolated aperture in accordance with steps S3 and S4; S6 all obtained extrapolated intensities form an image according to original pixel positions. Via the method and the system disclosed in the invention, details that cannot be distinguished originally can now be distinguished, a diffraction limit is broken, and a spatial resolution can be improved. Artificial radiation illumination on an object being observed is not needed, and prior information of the object being observed is also not needed.

The invention provides an optical fiber helical antenna wave field converter. The optical fiber helical antenna wave field converter is characterized by consisting of a section of annular core optical fiber 2 with a long-period fiber grating 1 and a helical antenna 3 in the center of a fiber end, wherein the fiber end of the annular core optical fiber 2 is ground to form a fiber end cone frustum 4, and the annular core optical fiber 2 comprises an outer cladding 5, an annular fiber core 6 and an inner cladding 7; input light 8 is injected into the annular core fiber 2 to form a low-order conduction mode 9, modulated by the long-period fiber grating 1 and converted into a radial polarization mode 10, total internal reflection occurs at an interface of the outer cladding 5 and an external medium when the input light is transmitted through the fiber end cone frustum 4, and reflected light waves 11 are diffracted in the fiber end cladding and transmitted to the end face of the fiber end and then focused at the fiber end; constructive interference 12 is generated at the focusing position, so that a longitudinal polarized light field 13 with enhanced interference is generated at the center of the fiber end, and the longitudinal polarized light field 13 outputs a circular polarized light field 14 after being modulated by the spiral antenna 4. The optical fiber helical antenna wave field converter can be applied to the fields of wave field conversion, signal detection, light control and the like.

The invention discloses a light focusing structure. The light focusing structure is a three-dimensional taper asymmetric structure made of photoresist; two faces of the sides of the tapered asymmetric structure are tapered planes, and the other face is a tapered arc surfacer; the bottom surface of the tapered asymmetric structure is a plane; and the surface of the tapered non-asymmetric structure is plated with a metal layer. Incident light is coupled as plasma wave on the metal surface to focus on a structure tip, which can break through a diffraction limit and makes the diameter of a focusing facula smaller than 100 nanometers. Besides, the light focusing structure has no a symmetric axis in any direction, so that the light focusing structure can effectively utilize polarized light energy of any polarization direction under radiation of a wide light spectrum light source without polarization processing and can maximally utilize the incident light energy. The light focusing structure is high in feasibility, can be used for manufacturing the optical fiber probe to be used for near field optical detection, can be applied in the optical cutting edge field like the single molecule fluorescence imaging and has a high scientific research value and a wide market application prospect.

The invention discloses an integrated terahertz wave far-field ultra-diffraction focusing imaging system, relates to the technical field of terahertz wave imaging, and solves the problems that the conventional terahertz wave imaging technology is based on the near-field optical principles although the conventional terahertz wave imaging technology achieves the super-resolution imaging. The conventional imaging technology has the problems that the focal length is very small, the dynamic focusing cannot be achieved, the width is narrower and the diffraction efficiency is smaller. The main pointsof the technical scheme are that the system comprises a terahertz wave source, an optical pump, a terahertz wave focusing device and a main control circuit. The terahertz wave source is used for emitting the terahertz waves, and the optical pump is used for generating continuous visible light to irradiate the terahertz wave focusing device. The terahertz wave focusing device is used for changingthe transmissivity of terahertz waves, and the main control circuit is used for applying a bias voltage to the terahertz wave focusing device. The system is large in focal length, achieves the ultra-diffraction limiting resolution, achieves the dynamic focusing, increases the bandwidth, and improves the diffraction efficiency.

The invention discloses a manufacturing method and application of a metasurface nano-antenna array based on heavy ion track technology. Step S1: Designing a nano-antenna array by using finite-difference time-domain simulation software; Step S2: Optimizing the focus degree of a hyperfocus point; Step S3 : Fabrication of nano-antenna arrays based on metasurfaces; Step S4: Application of metasurface nano-antenna array structures in biological imaging; Step S5: Observation of sample morphology through dark-field microscope eyepieces and CCD cameras; Step S6: Metasurface-based The application of the nano-antenna array structure in biochemical detection solves the problems of serious energy loss in optical materials, no working distance, no imaging magnification and only one-dimensional imaging in the perfect lens reported in the past.

The invention discloses a method for preparing a self-organized periodic micro-nano structure in which glass and crystals are alternately arranged. Samples were prepared by suspension method, the sample ternary glass 35La 2 o 3 ‑xTa 2 o 5 ‑(65‑x)Nb 2 o 5 (5<x<45) or 35La 2 o 3 ‑xTiO 2 ‑(65‑x)Nb 2 o 5 (30<x<60), where x represents the mole percentage (mol.%); the sample is fixed on the displacement platform, the ultrafast laser emits an ultrafast laser beam, and the ultrafast laser beam passes through a shutter, a Glan Taylor prism and a half-wave The film is irradiated on the sample and focused into the sample; when the focused sample is excited by the ultrafast laser beam and visible light appears, the displacement platform is started to make the sample move relative to the laser beam according to the set path and motion parameters. At the focal point of , polarization-dependent periodic micro-nanostructures are induced. The invention realizes the high-efficiency preparation of a polarization-dependent periodic micro-nano structure, and expands the functional materials that can be used for forming the periodic micro-nano structure.

The invention discloses an optical fiber bundle super-resolution imaging, a system, computer equipment and a storage medium, and belongs to the field of optical fiber bundle imaging. The method includes: acquiring a plurality of sample fluorescence images irradiated by different structured light through the optical fiber bundle; calculating and obtaining a wide-field image; The low-resolution sample image is obtained by calculation; the optical fiber bundle structured light illumination image corresponding to each sample fluorescence image is calculated; the covariance image and its optical transfer function are calculated; the super-resolution sample image is calculated and reconstructed. The invention can not only remove the honeycomb structure existing in the optical fiber bundle image, but also apply the super-resolution concept to the optical fiber bundle imaging to realize high-resolution imaging.

The invention provides a laser machining device of an annular micropore. The laser machining device of the annular micropore comprises a pulse laser, a polarization control system, a scanning mirror, an aperture, a focusing lens, a confinement layer, single-layer nano-particles, a three-dimensional moving platform and a computer control system. The pulse laser, the polarization control system and the scanning mirror are distributed along the same optical axis center in order. The aperture and the focusing lens are arranged right below the scanning mirror and the three-dimensional moving platform is arranged right below the focusing lens. The pulse laser, the focusing lens and the three-dimensional moving platform are connected with the computer control system. The creating of the annular micropore is realized in the way of depositing the single-layer nano-particles on the surface of a workpiece by the pretreatment of the surface of the workpiece, then determining the energy strengthening multiple, and machining the surface of the workpiece by the output energy of the pulse laser. According to the device, the laser machining of the annular micropore can be realized. The device has the characteristics of being high in accuracy, controllable in size, high in machining efficiency, simple in equipment and like.

The application discloses a method for preparing a spatial optical waveguide, the method comprising: coating photoresist between the light port carriers to be connected, identifying and designing the connection path, and irradiating the support structure prepared by the photoresist with multiple spirals The spatial optical waveguide composed of the photoresist wrapped by the cured support structure realizes the preparation of the spatial optical waveguide. The spatial optical waveguide preparation method of the present application promotes the photoresist to undergo polymerization and cross-linking reactions to cure through the non-linear absorption effect of the photoresist on the irradiated light energy, which can break through the diffraction limit and realize any processing with a resolution of less than 100 nanometers. The processing of the three-dimensional spatial optical waveguide, so the three-dimensional optical waveguide can be matched with the size of the optical port to be connected, which reduces the loss during the coupling process of the optical waveguide, and the support structure of the spiral processing improves the spatial optical waveguide. Strength, realizing high-quality large-pitch device interconnection.

The invention discloses a fast super-resolution detection device and detection method for random phase-shifting optical element defects. The controller adjusts the polarization state of the laser, which is divided into two beams in equal proportions through the 1×2 fiber coupler II, and the other laser output through the 1×2 fiber coupler I passes through the 1×2 fiber coupler III Equally divided into two beams; the four beams of illumination laser light are symmetrically hit on the sample surface through the entrance pupil of the microscope objective lens for interference to form a two-dimensional cosine structured illumination light; the microscope objective lens is used to receive the structured illumination light and modulate it on the sample surface After the reflected and scattered light, the final return imaging signal collection is completed in the high-speed camera through the imaging lens. To achieve the goals of miniaturization, portability, high efficiency, random phase shift and low cost.