Metasurface-Based Optical Liquid Crystal Cell as an Ultrathin Spatial Phase Modulator for THz Applications,ACS Photonics

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Metasurface-Based Optical Liquid Crystal Cell as an Ultrathin Spatial Phase Modulator for THz Applications
ACS Photonics ( IF 6.5 ) Pub Date : 2020-11-09 , DOI: 10.1021/acsphotonics.0c01263
O. Buchnev ₁ , N. Podoliak ₂ , K. Kaltenecker _{3,

4} , M. Walther ₄ , V. A. Fedotov ₁

Affiliation

A concept of an efficient ultrathin spatial phase modulator for correcting terahertz wavefronts in transmission with subwavelength spatial resolution is experimentally demonstrated. It exploits a combination of spatially addressable resonant planar metamaterials (so-called metasurfaces) and an optically thin (<0.04λ) low-voltage (<20 V) liquid crystal cell. The device allows “imprinting” of a 2D phase profile of any spatial complexity with a spatial resolution better than 0.23λ and can be readily fabricated using the well-established LC-device technology and high-resolution photolithography technique.

中文翻译：

基于超表面的光学液晶单元，作为太赫兹应用的超薄空间相位调制器

实验证明了一种有效的超薄空间相位调制器的概念，用于以亚波长空间分辨率校正传输中的太赫兹波前。它利用了可空间寻址的谐振平面超材料（所谓的超表面）和光学上薄的（<0.04λ）低压（<20 V）液晶单元的组合。该设备允许“刻印”任何具有空间分辨率高于0.23λ的空间复杂度的2D相位剖面，并且可以使用成熟的LC器件技术和高分辨率光刻技术轻松制造。

更新日期：2020-11-18

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