A review of gap‐surface plasmon metasurfaces: fundamentals and applications

作者：Fei Ding, Yuanqing Yang, R. Deshpande, Sergey I. Bozhevolnyi · 发表于：Nanophotonics · 年份：2018 · DOI：10.1515/nanoph-2017-0125 · 被引用次数：371 · 研究领域：Plasmonic and Surface Plasmon Research、Metamaterials and Metasurfaces Applications、Gold and Silver Nanoparticles Synthesis and Applications

Abstract Plasmonic metasurfaces, which can be considered as the two‐dimensional analog of metal‐based metamaterials, have attracted progressively increasing attention in recent years because of the ease of fabrication and unprecedented control over the reflected or transmitted light while featuring relatively low losses even at optical wavelengths. Among all the different design approaches, gap‐surface plasmon metasurfaces – a specific branch of plasmonic metasurfaces – which consist of a subwavelength thin dielectric spacer sandwiched between an optically thick metal film and arrays of metal subwavelength elements arranged in a strictly or quasi‐periodic fashion, have gained awareness from researchers working at practically any frequency regime as its realization only requires a single lithographic step, yet with the possibility to fully control the amplitude, phase, and polarization of the reflected light. In this paper, we review the fundamentals, recent developments, and opportunities of gap‐surface plasmon metasurfaces. Starting with introducing the concept of gap‐surface plasmon metasurfaces, we present three typical gap‐surface plasmon resonators, introduce generalized Snell’s law, and explain the concept of Pancharatnam‐Berry phase. We then overview the main applications of gap‐surface plasmon metasurfaces, including beam‐steerers, flat lenses, holograms, absorbers, color printing, polarization control, surface wave couplers, and dynamically reconfigurable metasurface...