Dynamically Tunable Deep Subwavelength High‐Order Anomalous Reflection Using Graphene Metasurfaces,Advanced Optical Materials

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Dynamically Tunable Deep Subwavelength High‐Order Anomalous Reflection Using Graphene Metasurfaces
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-27 , DOI: 10.1002/adom.201701047
Chao Wang ₁ , Wenwei Liu ₁ , Zhancheng Li ₁ , Hua Cheng ₁ , Zhi Li ₁ , Shuqi Chen ₁ , Jianguo Tian ₁

Affiliation

Graphene‐based metasurfaces have emerged as promising photoelectric devices that can dynamically control the behavior of electromagnetic waves. The high‐order anomalous reflection provides an additional degree of freedom in the field of photonic research. Here, a series of gradient graphene metasurfaces with high‐order modes to manipulate the wavefront of reflected light is proposed. By properly arranging the graphene nanostructures, 5‐order anomalous reflection and 15‐order high‐quality Laguerre–Gaussian beams are achieved. Furthermore, the efficiency of the metasurfaces is dynamically controlled by tuning the electrostatic gating to change the Fermi energy of graphene. This work offers a new idea for the development of tunable wavefront‐controlling devices and contributes to a wide range of applications in photonic systems.

中文翻译：

使用石墨烯超表面的可动态调谐的深亚波长高阶异常反射

基于石墨烯的超表面已经成为有前途的光电器件，可以动态控制电磁波的行为。高阶异常反射为光子研究领域提供了额外的自由度。在此，提出了一系列具有高阶模式的梯度石墨烯超表面来控制反射光的波前。通过适当地排列石墨烯纳米结构，可以实现5阶异常反射和15阶高质量Laguerre-Gaussian光束。此外，通过调整静电门控以改变石墨烯的费米能，可以动态控制超颖表面的效率。这项工作为可调谐波前控制设备的开发提供了新思路，并为光子系统的广泛应用做出了贡献。

更新日期：2017-12-27

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