nematic liquid crystals的光致多稳态和Freedericksz相变
Light-induced multistability and Freedericksz transition in nematic liquid crystals
摘要：
我们研究了垂直取向液晶盒的光传输，并自洽地求解了耦合到麦克斯韦方程组的非线性方程。我们证明，在一定阈值以上的输入光强度，液晶盒突然改变其光学性质，由于光诱导Freedericksz转变，表现出多稳态的依赖性的传输。我们认为这些性质可以用于基于液晶的可调谐全光开关光子器件。
英文摘要：
We study light transmission through a homeotropically oriented nematic liquid crystal cell and solve self-consistently a nonlinear equation for the nematic director coupled to Maxwell's equations. We demonstrate that above a certain threshold of the input light intensity, the liquid-crystal cell changes abruptly its optical properties due to the light-induced Freedericksz transition, demonstrating multistable hysteresis-like dependencies in the transmission. We suggest that these properties can be employed for tunable all-optical switching photonic devices based on liquid crystals.
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