Optical memory and storage method based on cholesteric liquid crystal doped with semiconductor impurities

Abstract

The invention discloses a cholestic liquid crystal optical memory based on semiconductor impurity doping. The optical memory comprises a liquid crystal layer (1), wherein an upper PI (prodium iodide) orientation layer (2), an upper ITO (indium tin oxide) electrode (3) and an upper glass substrate (4) are sequentially arranged on the upper surface of the liquid crystal layer (1) from bottom to top, a lower PI orientation layer (5), a lower ITO electrode (6) and a lower glass substrate (7) are sequentially arranged on the lower surface of the liquid crystal layer (1) from top to bottom, liquid crystal of the liquid crystal layer (1) is nanorod-shaped ZnO (zinc oxide) particle-doped cholestic liquid crystal, the diameter of the nanorod-shaped ZnO particle is 5nm to 10nm, the length of the nanorod-shaped ZnO particle is 30nm to 50nm, and the doping concentration is 0.1wt%. By improving a recording medium, the photo refraction function is realized by utilizing p semiconductor impurities to be doped with the cholestic liquid crystal, so that an optical signal can be sensitively responded and recorded; a bi-stable state domain of the cholestic liquid crystal is used for storing optical information. The invention also discloses a method adopting the optical memory to store the optical signal.

Description

technical field [0001] The invention belongs to the technical field of photoelectric information processing, and relates to an optical memory capable of storing optical signals based on cholesteric liquid crystal doped with semiconductor materials. Background technique [0002] In today's information age, massive amounts of data need to be stored. There are two main storage methods at present: magnetic storage and optical storage. Magnetic storage is a traditional storage method, which has low storage density and can only record electronic signals conveniently. Due to the current situation that the amount of information is very large, and the carrier of information has changed from traditional electrons to photons, more and more occasions (such as the propagation, calculation and storage of optical signals) require direct processing of optical signals, so optical storage As a new storage technology, more and more attention has been paid to it. The principle of optical sto...

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Problems solved by technology

Although cholesteric memory has a good storage effect, it can only store electrical signals and cannot store optical signals because it does not have the photorefractive effect.

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