All‐Dielectric Multichannel Terahertz Metasurface Empowering Independent Wavefront Manipulation

Author:

Yue Zhen1ORCID,Li Jitao1,Li Jie2,Zheng Chenglong13,Lu Binbin4,Liu Jingyu5,Yang Fan1,Li Hui1,Zhang Yan5,Zhang Yating15,Zang Xiaofei4,Yao Jianquan1

Affiliation:

1. Key Laboratory of Opto‐Electronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Opto‐Electronics Engineering Tianjin University Tianjin 300072 China

2. Information Materials and Device Applications Key Laboratory of Sichuan Provincial Universities Chengdu University of Information Technology Chengdu Sichuan 610225 China

3. Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics Zhengzhou University Zhengzhou 450052 China

4. Terahertz Technology Innovation Research Institute and Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China

5. Beijing Key Laboratory for Metamaterials and Devices Department of Physics Capital Normal University Beijing 100048 China

Abstract

AbstractMetasurfaces have demonstrated unprecedented capabilities in modulating the polarization and phase of electromagnetic waves and formed an emerging field of research, driving the exploitation of versatile compact devices. In this work, one transmission‐mode, multichannel all‐silicon metasurface platform that can implement functionalities separately in two orthogonally polarized output fields under linearly polarized incidences is proposed, which can effectively promote the design flexibility. Specifically, a single metasurface can realize multiple independent target phase distributions carrying specific phase relationships, thus enabling different information processing in different linear polarization states. For proof‐of‐principle experimental exhibitions, a monolayer metasurface composed of silicon pillars is designed, fabricated, and characterized to demonstrate the ability of multi‐dimensional light field control, such as polarization‐switchable focusing beam. Moreover, the other designed metasurface can generate polarization‐switchable Bessel vortex beams under linearly polarized incidences, which also verifies the flexibility and practicality of such platform. This metasurface platform may lead to new optical components, involving multichannel singular beam generators, information encoders, and holographic encryption devices.

Funder

National Natural Science Foundation of China

Key Technologies Research and Development Program

Publisher

Wiley

Subject

General Physics and Astronomy

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