Bidirectional high-speed optical wireless communication with tunable large field of view assisted by liquid crystal metadevice

IF 6.5 2区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanophotonics Pub Date : 2024-09-27 DOI:10.1515/nanoph-2024-0434

Mian Wu, Chao Yang, Yuhan Gong, Lin Wu, Ming Luo, Ying Qiu, Yongquan Zeng, Zile Li, Zichen Liu, Chao Li, Hanbing Li, Xi Xiao, Zhixue He, Guoxing Zheng, Shaohua Yu, Jin Tao

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引用次数: 0

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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液晶元器件辅助下的可调大视场双向高速无线光通信

光束转向红外（IR）光通信作为拥挤的无线通信流量的解决方案之一，受到了极大的关注。高性能主动光束转向设备在数据分配和交换中发挥着至关重要的作用。传统的光束转向器件，如空间光调制器（SLM）和微机电系统（MEMS）反射镜，以及目前新兴的基于元表面的非机械光束转向器件，都难以实现超过几度的大可调转向角，这极大地阻碍了光无线通信（OWC）的空间应用。本文提出了一种由 LC 元表面和硅基液晶（LCoS）组成的角放大液晶（LC）元器件，以实现可调大视场（FOV）的主动光束转向。基于角放大可调液晶元器件，实验演示了一种智能双向高速 OWC 系统，实现了 20° × 20° 的主动放大视场角，在自由空间传播距离为 1.5 米的 S/C/L 波段上行和下行传输的数据速率均为 200 Gbps。拟议的 OWC 系统为未来的高性能无线数据传输开辟了一条新途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

13.50

自引率

6.70%

发文量

358

审稿时长

7 weeks

期刊介绍： Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.