Active optical metasurfaces: comprehensive review on physics, mechanisms, and prospective applications
Active optical metasurfaces: comprehensive review on physics, mechanisms, and prospective applications
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DOI：
10.1088/1361-6633/ac2aaf
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发表时间：
2022-03
影响因子：
18.1
通讯作者：
Jingyi Yang;Sudip Gurung;Subhajit Bej;P. Ni;Ho Wai Howard Lee
中科院分区：
文献类型：
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作者：
Jingyi Yang;Sudip Gurung;Subhajit Bej;P. Ni;Ho Wai Howard Lee
具有亚波长厚度的光学超颖表面由于其前所未有的控制透射光、反射光和衍射光的相位、振幅和偏振的能力而对基础光学和新型光学应用的未来发展具有相当大的希望。将有源功能引入光学超颖表面是开发下一代平板光学元件和器件的重要一步。在过去的几年中，已经进行了许多尝试来开发具有光学特性的动态控制的可调光学超颖表面（例如，幅度、相位、偏振、空间/光谱/时间响应）和早期器件功能（例如，光束操纵、可调聚焦、可调滤色器/吸收器、动态全息图等）。这些最近开发的主动超颖表面显示出对实际应用的重大承诺，但仍然存在重大挑战。在这篇综述中，提供了一个全面的概述最近报道的可调超颖表面的重点是十大可调超颖表面机制。对于每一种类型的机制，性能指标的报告可调元表面的概述，并比较和总结的能力/限制，每种机制及其潜力的各种光子应用。本文最后讨论了基于可调谐光学超颖表面的几种应用前景、新兴技术和研究方向。我们预计在未来几年内进一步发展可调机制时会有重大的新进展。
Optical metasurfaces with subwavelength thickness hold considerable promise for future advances in fundamental optics and novel optical applications due to their unprecedented ability to control the phase, amplitude, and polarization of transmitted, reflected, and diffracted light. Introducing active functionalities to optical metasurfaces is an essential step to the development of next-generation flat optical components and devices. During the last few years, many attempts have been made to develop tunable optical metasurfaces with dynamic control of optical properties (e.g., amplitude, phase, polarization, spatial/spectral/temporal responses) and early-stage device functions (e.g., beam steering, tunable focusing, tunable color filters/absorber, dynamic hologram, etc) based on a variety of novel active materials and tunable mechanisms. These recently-developed active metasurfaces show significant promise for practical applications, but significant challenges still remain. In this review, a comprehensive overview of recently-reported tunable metasurfaces is provided which focuses on the ten major tunable metasurface mechanisms. For each type of mechanism, the performance metrics on the reported tunable metasurface are outlined, and the capabilities/limitations of each mechanism and its potential for various photonic applications are compared and summarized. This review concludes with discussion of several prospective applications, emerging technologies, and research directions based on the use of tunable optical metasurfaces. We anticipate significant new advances when the tunable mechanisms are further developed in the coming years.