Affiliation:
1. State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences 500 Yu Tian Road Shanghai 200083 China
2. University of Chinese Academy of Sciences No.19 Yuquan Road Beijing 100049 China
3. Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences No.1 SubLane Xiangshan Hangzhou 310024 China
4. Shanghai Research Center for Quantum Sciences 99 Xiupu Road Shanghai 201315 China
Abstract
AbstractThe Jones matrix, with eight degrees of freedom (DoFs), provides a general mathematical framework for the multifunctional design of metasurfaces. Theoretically, the maximum eight DoFs can be further extended in the spectrum dimension to endow unique encryption capabilities. However, the topology and intrinsic spectral responses of meta‐atoms constrains the continuous engineering of polarization evolution over wavelength dimension. In this work, a forward evolution strategy to quickly establish the mapping relationships between the solutions of the dispersion Jones matrix and the spectral responses of meta‐atoms is reported. Based on the eigenvector transformation method, arbitrary conjugate polarization channels over the continuous‐spectrum dimension are successfully reconstructed. As a proof‐of‐concept, a silicon metadevice is demonstrated for optical information encryption transmission. Remarkably, the arbitrary combination forms of polarization and wavelength dimension increase the information capacity (210), and the measured polarization contrasts of the conjugate polarization conversion are >94% in the entire wavelength range (3–4 µm). It is believed that the proposed approach will benefit secure optical and quantum information technologies.
Funder
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Natural Science Foundation of Zhejiang Province
Science and Technology Commission of Shanghai Municipality
China Postdoctoral Science Foundation
Shanghai Rising-Star Program
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
8 articles.
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