Issue 27, 2016
From the journal:

Nanoscale

High-responsivity graphene-on-silicon slot waveguide photodetectors†

Jiaqi Wang,‡a   Zhenzhou Cheng,‡*b   Zefeng Chen,a   Xi Wan,a   Bingqing Zhu,a   Hon Ki Tsang,a   Chester Shu*a  and  Jianbin Xua  

* Corresponding authors

a Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
E-mail: ctshu@ee.cuhk.edu.hk

b Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan
E-mail: zzcheng@chem.s.u-tokyo.ac.jp

Abstract

We demonstrated strong optical absorption in a graphene integrated silicon slot waveguide. Due to the increase in light intensity and decrease of optical mode confinement in the silicon slot, the graphene experienced an increased interaction to the in-plane light. A waveguide absorption of 0.935 dB μm−1 was measured at 1.55 μm wavelengths. Based on the graphene-on-silicon slot waveguide, a compact and high-responsivity photodetector was demonstrated. Benefited from the lack of efficient electron cooling in the suspended graphene and the intensity enhancement effect in the nano slot, a maximum responsivity of 0.273 A W−1 was achieved in the telecommunication band.

Graphical abstract: High-responsivity graphene-on-silicon slot waveguide photodetectors

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C6NR03122F
Article type
Communication
Submitted
16 Apr 2016
Accepted
13 Jun 2016
First published
14 Jun 2016

Nanoscale, 2016,8, 13206-13211

Permissions

Request permissions

High-responsivity graphene-on-silicon slot waveguide photodetectors

J. Wang, Z. Cheng, Z. Chen, X. Wan, B. Zhu, H. K. Tsang, C. Shu and J. Xu, Nanoscale, 2016, 8, 13206 DOI: 10.1039/C6NR03122F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements