Ferroelectric liquid crystal geometric phase device and preparation system and preparation method thereof

Abstract

The invention discloses a ferroelectric liquid crystal geometric phase device as well as a preparation system and a preparation method thereof. The ferroelectric liquid crystal geometric phase device comprises two oppositely arranged glass substrates, light-operated orientation layers positioned on opposite surfaces of the glass substrates, and a ferroelectric liquid crystal layer positioned between the glass substrates. The ferroelectric liquid crystal layer is composed of ferroelectric liquid crystal molecules of a spiral structure, the spiral axis pointing direction structure of the ferroelectric liquid crystal molecules is a geometric phase device structure, and the distance between the two opposite glass substrates is 5 micrometers. The molecular orientation of the light-operated orientation layer is determined by a ferroelectric liquid crystal light-operated orientation system based on a spatial light modulator, and the direction of the light-operated orientation layer is the same as the direction of a ferroelectric liquid crystal spiral shaft and is perpendicular to the polarization direction of polarized light. The device has the advantages of extremely high responding rate and low driving voltage demand.

Description

technical field [0001] The invention relates to the technical field of geometric phase devices, in particular to a ferroelectric liquid crystal geometric phase device, a preparation system and a preparation method thereof. Background technique [0002] Geometric phase devices have important applications in light field manipulation and optical display. Traditional geometric phase devices mostly use passive devices, and the manufacturing process is complicated and cannot be adjusted. Liquid crystal-based geometric phase devices have the advantages of high diffraction efficiency, small optical thickness, and high integration. [0003] At present, the preparation of liquid crystal geometric phase devices is mostly based on light-controlled alignment technology. Compared with the traditional rubbing alignment technology, this non-contact alignment technology largely avoids dust, static electricity and other impurities in the rubbing alignment technology. problem, and is not lim...

AI Technical Summary

Problems solved by technology

[0005] In existing liquid crystal geometric phase devices, the response time is only on the order of milliseconds, which cannot meet the industrial application standard

At present, the use of blue phase liquid crystal or cholesteric liquid crystal can shorten the response time, but there are a series of problems such as high driving voltage and difficult material preparation and processing.

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