Metasurfaces for Terahertz Wavefront Modulation: a Review

被引:88
作者
He, Jingwen [1 ]
Dong, Tao [1 ]
Chi, Baihong [1 ]
Zhang, Yan [2 ,3 ]
机构
[1] Beijing Inst Satellite Informat Engn, State Key Lab Space Ground Integrated Informat Te, Beijing 100095, Peoples R China
[2] Capital Normal Univ, Dept Phys, Beijing Key Lab Metamat & Devices, Beijing 100048, Peoples R China
[3] Capital Normal Univ, Key Lab Terahertz Optoelect, Minist Educ, Beijing Adv Innovat Ctr Imaging Theory & Technol, Beijing 100048, Peoples R China
基金
中国国家自然科学基金;
关键词
Terahertz; Wavefront modulation; Passive metasurface; Active metasurface; FRESNEL ZONE-PLATE; PHASE DISCONTINUITIES; TUNABLE METASURFACE; NEGATIVE INDEX; BESSEL BEAMS; LENS; GENERATION; REFLECTION; METAMATERIALS; TRANSMISSION;
D O I
10.1007/s10762-020-00677-3
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Metasurface is an artificial material composed of a series of subwavelength structure units and has unique electromagnetic characteristics. Based on the ability of manipulating the phase, amplitude, and polarization of electromagnetic wave, various kinds of metasurfaces are designed to realize wavefront manipulations, such as beam focusing, beam steering, vector beams generating, and holographic imaging. This paper reviews the design methods of metasurfaces for wavefront modulation and evolution of the metasurfaces designed for wavefront manipulation in the terahertz (THz) region. The metasurfaces can be divided into two categories: passive and active metasurfaces. For the passive metasurfaces, the single-functional metasurfaces, multifunctional metasurfaces, and high diffraction efficient metasurfaces designed for various THz wavefront shaping, such as focusing, imaging, and special beams generating, are reviewed. For the active metasurfaces, the metasurfaces with fixed structure and all-optical metasurfaces without fixed structure for THz wavefront modulation are summarized. Furthermore, a comparison on the performance of different kinds of metasurfaces for THz wavefront modulation is presented and the development direction and challenges of the THz wavefront modulation metasurfaces in the future are discussed.
引用
收藏
页码:607 / 631
页数:25
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