High-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm

Jingshu Guo; Jiang Li; Chaoyue Liu; Yanlong Yin; Wenhui Wang; Zhenhua Ni; Zhilei Fu; Hui Yu; Yang Xu; Yaocheng Shi; Yungui Ma; Shiming Gao; Limin Tong; Daoxin Dai

doi:10.1038/s41377-020-0263-6

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High-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm

Article

- High-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm
- Light: Science & Applications Vol. 9, Issue 2, Pages: 274-284(2020)
- Affiliations：
  
  1.State Key Laboratory for Modern Optical Instrumentation, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Zijingang Campus, 310058 Hangzhou, China
  2.Ningbo Research Institute, Zhejiang University, 315100 Ningbo, China
  3.Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, 211189 Nanjing, China
  4.College of Information Science and Electronic Engineering, Zhejiang University, 310027 Hangzhou, Zhejiang, China
- Author bio：
  
  Daoxin Dai (dxdai@zju.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-0263-6
  CLC：
- Published：2020，
  
  Published Online：28 February 2020，
  
  Received：18 August 2019，
  
  Revised：26 January 2020，
  
  Accepted：14 February 2020
- Accepted：
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Guo, J. S. et al. High-performance silicon−graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm. Light: Science & Applications, 9, 274-284 (2020).
DOI：

Guo, J. S. et al. High-performance silicon−graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm. Light: Science & Applications, 9, 274-284 (2020). DOI： 10.1038/s41377-020-0263-6.

摘要

Abstract

Graphene has attracted much attention for the realization of high-speed photodetection for silicon photonics over a wide wavelength range. However

the reported fast graphene photodetectors mainly operate in the 1.55 μm wavelength band. In this work

we propose and realize high-performance waveguide photodetectors based on bolometric/photoconductive effects by introducing an ultrathin wide silicon-graphene hybrid plasmonic waveguide

which enables efficient light absorption in graphene at 1.55 μm and beyond. When operating at 2 μm

the present photodetector has a responsivity of ~70 mA/W and a setup-limited 3 dB bandwidth of > 20 GHz. When operating at 1.55 μm

the present photodetector also works very well with a broad 3 dB bandwidth of > 40 GHz (setup-limited) and a high responsivity of ~0.4 A/W even with a low bias voltage of -0.3 V. This work paves the way for achieving high-responsivity and high-speed silicon–graphene waveguide photodetection in the near/mid-infrared ranges

which has applications in optical communications

nonlinear photonics

and on-chip sensing.

关键词

Keywords

references

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