ArticleNanophotonics (Berlin, Germany)2024
Bidirectional high-speed optical wireless communication with tunable large field of view assisted by liquid crystal metadevice.
Article in Nanophotonics (Berlin, Germany), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Beam-steered infrared (IR) light communication has gained tremendous attention as one of the solutions of congested wireless communication traffic. High performance active beam-steering devices play a crucial role in data allocation and exchange. Conventional beam-steering devices such as spatial light modulator (SLM) and micro-electrical mechanical system (MEMS) mirror and the current emerging nonmechanical beam-steering metasurface-based devices are challenging to realize a large tunable steering angle beyond several degrees, which significantly hinders the spatial application of optical wireless communications (OWC). Herein, an angle-magnified liquid crystal (LC) metadevice consisting of LC metasurfaces and a liquid crystal on silicon (LCoS) is proposed to realize active beam steering with a tunable large field of view (FOV). Based on the angle-magnified tunable LC metadevice, an intelligent bidirectional high-speed OWC system is experimentally demonstrated, achieving an actively enlarged FOV of 20° × 20°, with a data rate of 200 Gbps over the S/C/L band for both uplink and downlink transmission over a propagation distance of 1.5 m in free space. The proposed OWC system opens a new avenue for the future high performance wireless data transmission.
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