Dynamic Beam Switching by Liquid Crystal Tunable Dielectric Metasurfaces,ACS Photonics

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Dynamic Beam Switching by Liquid Crystal Tunable Dielectric Metasurfaces
ACS Photonics ( IF 6.5 ) Pub Date : 2018-02-08 00:00:00 , DOI: 10.1021/acsphotonics.7b01343
Andrei Komar ₁ , Ramón Paniagua-Domínguez ₂ , Andrey Miroshnichenko ₃ , Ye Feng Yu ₂ , Yuri S. Kivshar ₁ , Arseniy I. Kuznetsov ₂ , Dragomir Neshev ₁

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Dynamic steering of laser beams by ultrathin optical metasurfaces is a significant research advance for possible applications in remote ranging and sensing. A unique platform for such important functionalities is offered by dielectric metasurfaces that have the highest transmission efficiency. However, the realization of dynamically tunable metasurfaces still remains a challenge. Here we experimentally demonstrate the dynamic switching of beam deflection by a silicon-nanodisk dielectric metasurface infiltrated with liquid crystals. In particular, we show the switching of a laser beam from 0° to a 12° angle with an efficiency of 50% by heating the metasurface to modify the liquid crystal state from nematic to isotropic. Our results open important opportunities for tunable ultrathin beam steering metadevices.

中文翻译：

液晶可调介电超表面的动态光束切换

超薄光学超表面对激光束的动态控制是一项重要的研究进展，对于可能在远程测距和传感中的应用而言。具有如此重要功能的独特平台由具有最高传输效率的介电超表面提供。但是，动态可调超表面的实现仍然是一个挑战。在这里，我们通过实验证明了由液晶渗透的硅纳米盘介电超表面对光束偏转的动态转换。尤其是，我们显示了通过加热超表面将液晶状态从向列型转变为各向同性，以50％的效率将激光束从0°切换到12°的角度。我们的结果为可调谐超薄光束转向元设备打开了重要机遇。

更新日期：2018-02-08

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