Photorefractive effect of smectic liquid crystals and their application to laser ultrasonic remote sensing

T. Sasaki, Takaaki Yagami, Toshinobu Takashi, Kai Suzuki, Gouta Ikeda, Y. Ishii, K. Le, Y. Naka
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Abstract

The photorefractive effect of flexoelectric smectic liquid crystal mixtures was investigated and applied to a laser ultrasonic measurement. Smectic liquid crystal mixtures, composed of smectic-C liquid crystals, photoconductive chiral compounds, and a sensitizer, are known to exhibit a fast photorefractive effect. The principle of the ultrasonic measurement is that a nanosecond laser pulse is shot on an object to cause an ultrasonic vibration, a continuous laser beam is irradiated on the object, and the ultrasonic variation is detected using photorefractive two-beam coupling. This method can be used to investigate the thickness and the internal structure of an object without contact.
近晶液晶的光折变效应及其在激光超声遥感中的应用
研究了挠性电致晶液晶混合物的光折变效应,并将其应用于激光超声测量。由smic - c液晶、光导手性化合物和敏化剂组成的smic液晶混合物具有快速的光折变效应。超声波测量的原理是在物体上发射纳秒级激光脉冲引起超声振动,连续激光束照射在物体上,利用光折变双光束耦合检测超声变化。该方法可用于研究无接触物体的厚度和内部结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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