Laser holography interference method of similar-one-dimensional structure for preparation

Abstract

The invention belongs to the technical field of laser holography interference and relates to a laser holography interference method of a similar-one-dimensional structure for preparation. The laser holography interference method comprises the steps of firstly taking five laser beams through a laser device and enabling the laser beams to be symmetrically distributed and converged in the vertical direction, adding a single dielectric film high-reflexivity mirror at the converged position of the five laser beams, reflecting the five laser beams through the single dielectric film high-reflexivity mirror to produce five mirror image light beams consistent to original laser beam parameters, and then selecting exposure quantity according to the selected laser beams to obtain a quasi-crystal-period three-dimensional model; then adopting a polarization adjusting technical method and utilizing a single-wave-length half-wave plate to adjust polarization angles of the five laser beams from 0 degree to 90 degrees, namely obtaining the similar-one-dimensional structure laminated structure. The laser holography interference method is simple, reliable in principle, controllable in process, simple and convenient to operate, low in cost, high in repeatability, easy to achieve and capable of being widely applied to preparation of multiple light-sensitive media.

Description

Technical field: [0001] The invention belongs to the technical field of laser holographic interference, and relates to a laser holographic interference process, in particular to a laser holographic interference method for preparing a one-dimensional structure. Background technique: [0002] Laser holographic interference technology uses most coherent lasers to converge at one point to form an interference pattern (also known as an optical grid point) with a spatial period change at the convergence point. Due to the different sensitivity of the recording medium in the interference field, the refractive index changes periodically to form The ordered structure that changes periodically is called photonic crystal, and its structure is determined by the parameters of coherent light. At present, the prepared photonic structures can be divided into one-dimensional, two-dimensional and three-dimensional optical lattice points according to the spatial periodicity of the dielectric co...

AI Technical Summary

Problems solved by technology

However, there are certain deficiencies in the existing methods. The preparation of photonic crystals of different dimensions requires the construction of different interference optical paths. poor repeatability

However, in the one-dimensional layered structure fabricated by double-beam interference, there are gaps between layers, which can easily cause interlayer collapse, introduce many defects, and have a low structural qualification rate.

When using other methods to prepare quasi-one-dimensional structures, the obtained structural bandgap mostly falls in the infrared band, and it is difficult to prepare photonic bandgap materials in the visible band. It is difficult to ensure the consistency of the light intensity, polarization, and phase of each beam of light. Even if the optical path is well built, it is relatively fragile during the experiment. If there is a slight environmental vibration, noise, or any beam of light does not match, there will be structural problems. It is difficult to prepare large-scale one-dimensional structures experimentally

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