@inproceedings{222194315e514a00ba27af1c2e5ba68e,
title = "Terahertz Focusing Enhancement for Graphene-Based Tunable Metalens",
abstract = "We propose a type of hybrid structure metalens composed of a graphene-loaded metallic metasurface sandwiched by two mutually orthogonal gratings, which can work in transmission modes for dynamic terahertz wavefront manipulation with tunability and enhanced focusing efficiency. Experimental results show that due to the multi-reflection between the metasurface layer and the grating layers, the focusing efficiency is enhanced by 1.8 times, and the focal length of the metalens is increased by 0.61mm by increasing the applied gate voltage on the graphene from 0V to 1.4V. We hope the proposed structure may open a new avenue for reconfigurable THz metasurfaces with high efficiencies.",
keywords = "Electrical Tunability, Electrical Tunability, Electrical Tunability, Enhanced Focusing Efficiency, Graphene, Metasurface, Terahertz, Ultra-small Thickness",
author = "Jianzhou Huang and Bin Hu and Guocui Wang and Weiguang Liu and Zongyuan Wang and Yan Zhang and Juan Liu",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; 2021 International Conference on Optical Instruments and Technology: Optical Systems, Optoelectronic Instruments, Novel Display, and Imaging Technology ; Conference date: 08-04-2022 Through 10-04-2022",
year = "2022",
doi = "10.1117/12.2618749",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Juan Liu and Baohua Jia and Liangcai Cao and Xincheng Yao and Yongtian Wang and Takanori Nomura",
booktitle = "2021 International Conference on Optical Instruments and Technology",
address = "United States",
}