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Electrically Tunable Multifunctional Polarization-Dependent Metasurfaces Integrated with Liquid Crystals in the Visible Region
Nano Letters ( IF 9.6 ) Pub Date : 2021-05-28 , DOI: 10.1021/acs.nanolett.1c00104
Yueqiang Hu 1, 2 , Xiangnian Ou 1 , Tibin Zeng 3 , Jiajie Lai 1 , Jian Zhang 1 , Xin Li 1 , Xuhao Luo 1 , Ling Li 1 , Fan Fan 3 , Huigao Duan 1, 2
Affiliation  

Metasurfaces open up new avenues for designing planar optics, enabling compact dynamic metadevices. Numerous dynamic strategies have been proposed, among which liquid crystal (LC) based metasurfaces are expected due to the maturity of LC materials. However, existing schemes rarely exploit the polarization manipulation capabilities of metasurfaces and the limited performance hinders the development of practical addressable devices. Here, we demonstrate an electrically tunable multifunctional polarization-dependent metasurface integrated with LCs in the visible range. By a combination of the helicity-dependent metasurface and the birefringent LCs, continuous intensity tuning and switching of two helicity channels are realized. Electrically tunable mono- and multicolor switchable metaholograms and dynamic varifocal metalenses are demonstrated with a simple and performance-enhancing integration scheme. Further, electrically addressable dynamic metasurfaces are achieved. The proposed modulation and integration schemes pave the way for addressable dynamic metasurface devices in various applications, such as space light modulators, light detection and ranging systems, and holographic displays.

中文翻译:

电可调多功能偏振相关超表面与可见光区的液晶集成

超表面为设计平面光学开辟了新途径,实现了紧凑的动态超器件。已经提出了许多动态策略,其中由于液晶材料的成熟,预计基于液晶(LC)的超表面。然而,现有方案很少利用超表面的偏振操纵能力,并且有限的性能阻碍了实用可寻址设备的发展。在这里,我们展示了在可见光范围内与 LC 集成的电可调多功能偏振相关超表面。通过将依赖螺旋的超表面和双折射 LC 相结合,实现了两个螺旋通道的连续强度调谐和切换。电可调单色和多色可切换元全息图和动态变焦超透镜通过简单且性能增强的集成方案进行演示。此外,实现了电可寻址的动态超表面。所提出的调制和集成方案为各种应用中的可寻址动态超表面器件铺平了道路,例如空间光调制器、光检测和测距系统以及全息显示器。
更新日期:2021-06-09
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