Abstract
Graphene is a two-dimensional material with numerous intriguing optical properties, such that graphene photonic devices have attracted great interest for sensing and communication applications. However, surface-illuminated graphene photonic devices usually suffer from weak light-matter interactions due to the atomic-layer thickness of graphene, seriously limiting the performances of such devices. To tackle this problem, waveguide-integrated graphene photonic devices have been demonstrated since 2010, which offer the advantage of much longer interaction length between the evanescent field of the optical waveguide and graphene than the surface-illuminated devices. Moreover, the fabrication of waveguide-integrated graphene photonic devices is compatible with the CMOS technology, allowing potentially low-cost and high-density on-chip integration. To date, a tremendous interest is growing in the hybrid integration platform composed of graphene and silicon photonic integrated circuits. In this paper, we review the recent progress in waveguide-integrated graphene photonic devices and their applications in sensing and communication.
Highlights
Graphene has fascinating optical properties for developing photonic devices [1]
We review the recent progress in waveguideintegrated graphene photonic devices for sensing and optical communication applications, namely, waveguideintegrated graphene photonic chemical sensors, polarizers, spatial-mode filters, modulators, and photodetectors
The effects of doping and defects of graphene need to be deeply investigated for further improving the sensitivity and specificity of graphene-based sensors
Summary
Received: 01 October 2019 Accepted: 06 February 2020 Published: 21 February 2020. Citation: Wang J, Xing Z, Chen X, Cheng Z, Li X and Liu T (2020) Recent Progress in Waveguide-Integrated Graphene Photonic Devices for Sensing and Communication Applications. Graphene is a two-dimensional material with numerous intriguing optical properties, such that graphene photonic devices have attracted great interest for sensing and communication applications. Surface-illuminated graphene photonic devices usually suffer from weak light-matter interactions due to the atomic-layer thickness of graphene, seriously limiting the performances of such devices. To tackle this problem, waveguide-integrated graphene photonic devices have been demonstrated since 2010, which offer the advantage of much longer interaction length between the evanescent field of the optical waveguide and graphene than the surface-illuminated devices. We review the recent progress in waveguide-integrated graphene photonic devices and their applications in sensing and communication
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