journal article·2023-05

Full Complex‐Amplitude Engineering by Orientation‐Assisted Bilayer Metasurfaces

Liangui Deng, Zile Li, Zhiqiang Guan, Jin Tao, Gongfa Li, Xiaoli Zhu, Qi Dai, Rao Fu, Zhou Zhou, Yan Yang, Shaohua Yu, Guoxing Zheng

Advanced Optical Materials· Volume 11· Issue 9
Publisher page

Abstract

Abstract Optical complex‐amplitude determines the propagation behavior of light in free space to the maximum extent. Precise control of complex‐amplitude is the key to generating user‐defined light fields. Current attempts to control optical complex‐amplitude using metasurface, however, either have limited amplitude/phase step numbers or lost high lateral resolution since amplitude and phase are usually manipulated with size‐varied nanostructures or several nanostructures integrated into a unit‐pixel. Here, it is shown that bilayer metasurface can readily decouple optical amplitude and phase, thus achieving arbitrary complex‐amplitude modulation only by arranging the orientation angles of nanostructures. In this design, each unit‐pixel in one layer has only one nanostructure with the same size, thus significantly increasing the lateral resolution of complex‐amplitude modulation. More importantly, the approach of controlling optical complex‐amplitude merely by changing nanostructure orientation can significantly simplify the metasurface design and aggrandize the fabrication tolerance, thus enhancing the robustness of metasurfaces toward practical applications.
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Research context

OpenAlex topics: Metamaterials and Metasurfaces Applications · Advanced Antenna and Metasurface Technologies · Plasmonic and Surface Plasmon Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic Information School and School of Microelectronics Wuhan University Wuhan 430072 China

Peng Cheng Laboratory Shenzhen 518055 China

School of Physics and Technology and Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of Education Wuhan University Wuhan 430072 China

Wuhan Institute of Quantum Technology Wuhan 430206 China

State Key Laboratory of Optical Communication Technologies and Networks China Information Communication Technologies Group Corporation (CICT) Wuhan 430074 China

The Key Laboratory for Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 China

School of Electrical and Electronic Information Engineering Hubei Polytechnic University Huangshi 435003 China

Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities

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