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 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.

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 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.