On the fringing-field effect in liquid-crystal beam-steering devices
On the fringing-field effect in liquid-crystal beam-steering devices
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DOI：
10.1364/ao.43.000011
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发表时间：
2004-01-01
期刊：
影响因子：
1.9
通讯作者：
Bahat-Treidel, E
中科院分区：
文献类型：
--
作者：
Apter, B;Efron, U;Bahat-Treidel, E
对液晶闪耀光栅结构中的边缘场效应进行了详细的数值模拟。这些研究的目的是澄清闪耀光栅的边缘场展宽相位轮廓的宽度与液晶盒厚度之间的关系。这种闪耀光栅的相位轮廓的边缘场加宽被示出主要影响闪耀光栅的2pi相位阶跃区（回扫区）。对闪耀光栅结构进行的模拟结果表明边缘场的两个主要影响：（1）可达到的衍射效率降低和（2）器件最大偏转角的限制。这两种效果被证明是直接链接到扩大的回扫区，这是示出成比例的LC单元厚度。(C)2004年美国光学学会。
A detailed simulation of the fringing-field effect in liquid-crystal (LC)-based blazed-grating structures has been carried out. These studies are aimed at clarifying the relationship between the width of the fringing-field-broadened phase profile of the blazed grating and the LC cell thickness. This fringing-field broadening of the blazed grating's phase profile is shown to affect mostly the 2pi phase-step zone (fly-back zone) of the blazed grating. The results of the simulations carried out on the blazed-grating structure indicate two main effects of the fringing field: (1) reduction in the attainable diffraction efficiency and (2) limitation of the maximum deflection angle of the device. Both effects are shown to be directly linked to the broadening of the fly-back zone, which is shown to be proportional to the LC cell thickness. (C) 2004 Optical Society of America.