Phase-only transmissive spatial light modulator based on tunable dielectric metasurface
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- 14 June 2019
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 364 (6445), 1087-1090
- https://doi.org/10.1126/science.aaw6747
Abstract
Rapidly developing augmented reality, solid-state light detection and ranging (LIDAR), and holographic display technologies require spatial light modulators (SLMs) with high resolution and viewing angle to satisfy increasing customer demands. Performance of currently available SLMs is limited by their large pixel sizes on the order of several micrometers. Here, we propose a concept of tunable dielectric metasurfaces modulated by liquid crystal, which can provide abrupt phase change, thus enabling pixel-size miniaturization. We present a metasurface-based transmissive SLM, configured to generate active beam steering with >35% efficiency and a large beam deflection angle of 11°. The high resolution and steering angle obtained provide opportunities to develop the next generation of LIDAR and display technologies.Keywords
Funding Information
- Institution of Engineering and Technology (IET A F Harvey Engineering Research Prize 2016)
- National Research Foundation-Prime Minister's office, Republic of Singapore (NRF-NRFI2017-01)
- Science and Engineering Research Council, Agency for Science, Technology and Research (152 73 00025)
- Science and Engineering Research Council, Agency for Science, Technology and Research (A18A7b0058)
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