Abstract

We proposed a novel strategy to design a deep subwavelength metasurface with full $2\pi$ transmission phase modulation and high transmission efficiency by applying resonators with interfering Fano resonance. Theoretical investigation demonstrates that the transmission efficiency of the resonators depends on the direct transmission coefficient, direct reflection coefficient, and $Q$ factor. When an impedance layer is added in the resonators, the direct transmission and direct reflection coefficients can be facilely manipulated so that the span of the transmission phase around the resonance frequency can be extended to $2\pi$. As a result, we can continuously adjust the transmission phase from 0 to $2\pi$ through changing the geometric parameters of the resonators and construct a deep subwavelength metasurface with the resonators to manipulate the transmission wave with high efficiency. We also find that a layer of grating can be used as the impedance layer to change direct transmission and direct reflection in the actual design of the metasurface. The proposed strategy may provide effective guidance to design a deep subwavelength metasurface for controlling a transmitted wave with high efficiency.

© 2017 Optical Society of America

High-efficiency Huygens’ metasurface for terahertz wave manipulation

Ruiqiang Zhao, Zheng Zhu, Guohua Dong, Tingting Lv, Yuxiang Li, Chunying Guan, Jinhui Shi, and Han Zhang
Opt. Lett. 44(14) 3482-3485 (2019)

Ultra-thin and high-efficiency graphene metasurface for tunable terahertz wave manipulation

Zhen Liu and Benfeng Bai
Opt. Express 25(8) 8584-8592 (2017)

Fano-resonance-based mode-matching hybrid metasurface for enhanced second-harmonic generation

Zhi Li, Wenwei Liu, Zhancheng Li, Hua Cheng, Shuqi Chen, and Jianguo Tian
Opt. Lett. 42(16) 3117-3120 (2017)

Demonstration of a highly efficient terahertz flat lens employing tri-layer metasurfaces

Chun-Chieh Chang, Daniel Headland, Derek Abbott, Withawat Withayachumnankul, and Hou-Tong Chen
Opt. Lett. 42(9) 1867-1870 (2017)

Transmissive terahertz metalens with full phase control based on a dielectric metasurface

Delin Jia, Yuan Tian, Wei Ma, Xiaofeng Gong, Jiayi Yu, Guozhong Zhao, and Xiaomei Yu
Opt. Lett. 42(21) 4494-4497 (2017)