Graphene Readout Silicon-Based Microtube Photodetectors for Encrypted Visible Light Communication

Ziyu Zhang; Tianjun Cai; Zengxin Li; Binmin Wu; Zhi Zheng; Chunyu You; Guobang Jiang; Mingze Ma; Zengyi Xu; Chao Shen; Xiang-Zhong Chen; Enming Song; Jizhai Cui; Gaoshan Huang; Yongfeng Mei

doi:10.1002/adma.202413771

Graphene Readout Silicon-Based Microtube Photodetectors for Encrypted Visible Light Communication

Adv Mater. 2024 Nov 21:e2413771. doi: 10.1002/adma.202413771. Online ahead of print.

Authors

Ziyu Zhang¹, Tianjun Cai¹, Zengxin Li², Binmin Wu³, Zhi Zheng¹, Chunyu You¹, Guobang Jiang¹, Mingze Ma¹, Zengyi Xu², Chao Shen², Xiang-Zhong Chen^{4

5

6

7}, Enming Song^{4

6}, Jizhai Cui^{1

6}, Gaoshan Huang^{1

4

5

6

7}, Yongfeng Mei^{1

4

5

6}

Affiliations

¹ Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymer, Fudan University, Shanghai, 200438, China.
² Key Laboratory for Information Science of Electromagnetic Waves Department of Communication Science and Engineering, Fudan University, Shanghai, 200438, China.
³ State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China.
⁴ Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, 200438, China.
⁵ Fudan University, Yiwu, Zhejiang, 322000, China.
⁶ International Institute of Intelligent Nanorobots and Nanosystems, Fudan University, Shanghai, 200438, China.
⁷ State Key Laboratory of Photovoltaic Science and Technology, Fudan University, Shanghai, 200438, China.

PMID: 39573846
DOI: 10.1002/adma.202413771

Abstract

The implementation of an advanced light receiver is imperative for the widespread application of visible light communication. However, the integration of multifunctional and high-performance visible light receivers is still limited by device structure and system complexity. Herein, a graphene-readout silicon-based microtube photodetector is proposed as the receiver for omnidirectional Mbps-level visible light communication. The integration of graphene-semiconductor material systems simultaneously ensures the effective absorption of incident light and rapid readout of photogenerated carriers, and the device exhibits an ultrafast response speed of 75 ns and high responsivity of 6803 A W^-1. In addition, the microtube photodetector realizes the omnidirectional light-trapping and enhanced polarization photodetection. As the receiving end of the visible light communication system, the microtube photodetector achieves a data rate of up to 778 Mbps, a field of view of 140°, and the encrypted visible light communication of polarized light, providing a new possibility for the future development of the internet of things and information security.

Keywords: graphene‐semiconductor heterostructure; microtube photodetectors; polarization photodetection; visible light communication; wide field of view.

Abstract

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