4 results about "Periodic nanostructures" patented technology

This invention relates to the field of nuclear detection technology, and more particularly to a method for improving light output based on different arrangements of conical structures. The method includes: constructing a periodic nanostructure array on a crystal surface to form a refractive index gradient interface to improve light extraction efficiency; the periodic nanostructure array is divided into tetragonal and hexagonal arrangements; establishing a physical model using the FDTD algorithm, while setting boundary conditions and light source types that conform to the physical conditions of perovskite luminescence; analyzing the influence of the two arrangements on transmittance using the scanning function of FDTD under a specific wavelength light source; iteratively optimizing the geometric parameters with a preset light transmittance using FDTD optical simulation combined with a particle swarm optimization algorithm; and evaluating the convergence of the particle swarm optimization. This invention solves the problem of low light extraction efficiency in existing technologies and has the advantages of strong structural inherentness, superior optical performance, and applicability to radiation detectors and other devices.

Provided are a nanoscale geometrical quantity certified reference material, and a preparation method and use thereof, belonging to the technical field of nano-scale measurements. The nanoscale geometrical quantity certified reference material includes a substrate and a periodic nanostructured two-dimensional supramolecular film attached to the substrate, where the periodic nanostructured two-dimensional supramolecular film is formed by self-assembly of 5,5′-(9H-fluorene-2,7-diyl)diisophthalic acid and 1,2-bis(4-pyridyl)ethane. Provided is also a preparation method of the nanoscale geometrical quantity certified reference material. The self-assembly is a bottom-up process to prepare a periodic nanostructured two-dimensional supramolecular film.

This invention discloses a fabrication process for a biomimetic moth-eye structure for anti-glare on glass surfaces, relating to the field of anti-glare technology for glass. Specifically, the fabrication process includes a biomimetic moth-eye structure and a processing technique. The processing technique includes a laser pretreatment stage, a chemical etching stage, and a post-processing stage. The laser pretreatment stage induces periodic nanostructures on the glass surface using femtosecond or picosecond lasers. This fabrication process for the biomimetic moth-eye structure for anti-glare on glass surfaces, through laser-induced chemical etching, successfully solves the problems of complex fabrication processes, high costs, and easy structure detachment in biomimetic moth-eye structure glass. It provides a feasible solution for the large-scale production of super anti-glare glass. This technology not only has significant advantages in optical performance but also possesses excellent mechanical stability and self-cleaning function, making it suitable for various display, photovoltaic, optical, and architectural fields.

The application discloses a kind of microcavity optical comb device and driving method based on double-ring coupling structure, the device includes pump laser, main optical microcavity, auxiliary optical microcavity and tuning unit;Main optical microcavity generates dissipative kerr soliton optical frequency comb under the excitation of pump light, auxiliary optical microcavity is coupled with main optical microcavity, and is provided with periodic nanostructure thereon, backscattering is generated to pump light with frequency in the resonance bandwidth of pump mode, so that pump laser realizes self-injection locking;Coupling between auxiliary optical microcavity and main optical microcavity induces mode splitting at pump mode, and transmission of pump light from main optical microcavity is inhibited;Tuning unit is arranged on auxiliary optical microcavity, for adjusting the resonance frequency of auxiliary optical microcavity and the degree of mode splitting.The application can realize the robustness of self-injection locking and the high conversion efficiency of soliton optical comb simultaneously without damaging the high Q value characteristics of main microcavity.