Laser-assisted thermal polarization equipment and method for microscopic second-order nonlinear susceptibility optical elements

Abstract

The invention discloses a laser-assisted thermal polarization device and method for a microscopy second order nonlinear polarizability optical element, which uses ITO glass coated with thin silver wire on a single face and a side face as anode, and uses silicon wafer as cathode. A continuous laser with wavelength of 1064 nanometers is used for carrying out microscopy thermal polarization on borophosphate laser glass doped with ions of Sm3+. The method assisted with a electric field, a thermal field and a laser field can be used for preparing a plurality of optical elements with micro-sized microstructures. The periodicity and morphology of a sample can be controlled by adjusting the laser parameters and the thermal polarization parameters. By using the method, an optical element with periodic microscopy second order nonlinear polarizability can be prepared at one time, the pattern resolution can reach micron or even nano level, the preparation efficiency can be increased by several times to dozens times compared with preparation of a traditional material, the shape and the atomic with microstructure distribution and size or the component of the molecular structure are controllable,and the preparation efficiency is high.

Description

technical field [0001] The invention relates to a preparation method of an optical element, in particular to a preparation method of an optical element with a microstructure, and is mainly used in the technical field of visible-near-infrared optical system materials and devices. Background technique [0002] In recent years, visible-near-infrared optical materials have been widely used in modern military and civilian high-tech fields such as information technology, laser technology and electronic communication technology. For crystal materials such as sapphire and diamond, it is difficult, inefficient, and costly to obtain aspheric lenses or prisms using traditional processes, and it is difficult to meet the rapidly developing optics and information technology requirements for miniaturization, integration, and functionalization of materials. Oxide glass materials have broad application prospects in visible-near-infrared optical systems due to their advantages such as low opt...

AI Technical Summary

Problems solved by technology

The previous modification mainly focused on ordinary micro-processing methods such as dry etching and photolithography. The disadvantages are that the equipment is expensive, the process is complicated, and the processing efficiency is low. Especially, photolithography is also affected by light.

But at present, the process of using continuous laser to thermally polarize glass cannot meet the needs of preparing visible-near-infrared optical materials. The process is complex, the resolution of patterning is not ideal, and the process controllability and production efficiency need to be improved

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