Recent demonstrations of metasurfaces show their great potential to realize flat and multifunctional optical elements, viable for many new device applications. Yet, a major frontier in this field is to develop active, tunable, and reconfigurable metasurface platforms. These are highly desirable in modern technologies that require dynamic modulation of light. To achieve this goal, in this work an active liquid‐crystal (LC) plasmonic metasurface integrated system is developed and studied. It is specifically used to demonstrate electrically switchable plasmonic‐metasurface‐based color tags. The active tags utilize the ability to rotate the polarization of incident light, by application of an external electric field on twisted nematic liquid crystal configuration. Combined with the wavelength and polarization‐selective response of the metasurface, it allows to obtain electrically controlled transmission colors potentially spanning the entire visible spectrum. It is experimentally demonstrated that the dynamic wavelength shift in the devices is greater than 100 nm at a low driving voltage varying from 0 to 5 V. These experimental results indicate the potential of active LC‐plasmonic metasurface platforms to realize the next‐generation dynamic optical devices.

中文翻译：

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基于有源液晶等离子超表面平台的电开关色标

近来的超颖表面演示表明，它们具有实现平面和多功能光学元件的巨大潜力，可用于许多新设备应用。然而，该领域的主要前沿是开发活动的，可调的和可重新配置的超表面平台。这些在需要动态调制光的现代技术中是非常需要的。为了实现这个目标，在这项工作中，开发并研究了有源液晶（LC）等离子超表面集成系统。它专门用于演示可电转换的基于等离子-元表面的颜色标签。有源标签通过在扭曲向列液晶配置上施加外部电场来利用旋转入射光偏振的能力。结合超颖表面的波长和偏振选择性响应，它允许获得潜在地跨越整个可见光谱的电控透射色。实验证明，在0至5 V的低驱动电压下，器件中的动态波长偏移大于100 nm。这些实验结果表明，有源LC等离子体超表面平台有潜力实现下一代动态光学设备。