Electrically tunable all-dielectric optical metasurfaces based on liquid crystals
Electrically tunable all-dielectric optical metasurfaces based on liquid crystals
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DOI：
10.1063/1.4976504
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发表时间：
2017-02-13
影响因子：
4
通讯作者：
Neshev, Dragomir N.
中科院分区：
文献类型：
--
作者：
Komar, Andrei;Fang, Zheng;Neshev, Dragomir N.
我们演示了电调谐的米氏共振介电超颖表面的光谱响应的硅纳米盘嵌入到液晶组成。我们使用的重取向的液晶在一个温和的外加电场，以改变周围的超颖表面的各向异性介电常数张量。通过切换控制电压“开”和“关”，我们诱导超颖表面共振的大的光谱偏移，导致高达75%的绝对透射调制。我们的电介质超颖表面的电压控制的实验演示铺平了道路，为新型的电可调元器件，包括动态显示和全息图。出版社：AIP Publishing
We demonstrate electrical tuning of the spectral response of a Mie-resonant dielectric metasurface consisting of silicon nanodisks embedded into liquid crystals. We use the reorientation of nematic liquid crystals in a moderate applied electric field to alter the anisotropic permittivity tensor around the metasurface. By switching a control voltage "on" and "off," we induce a large spectral shift of the metasurface resonances, resulting in an absolute transmission modulation of up to 75%. Our experimental demonstration of voltage control of dielectric metasurfaces paves the way for new types of electrically tunable metadevices, including dynamic displays and holograms. Published by AIP Publishing.