Journal Article

Highly sensitive hot electron bolometer based on disordered graphene

Chen, Yi, Chen, Jianhui, Liu, Gerui, Gao, Teng, Yu, Dapeng, Zhang, Yanfeng, Liu, Zhongfan, Wu, Xiaosong, Han, Qi, Zhang, Rui

2013

Overview

A bolometer is a device that makes an electrical resistive response to the electromagnetic radiation resulted from a raise of temperature due to heating. The combination of the extremely weak electron-phonon interactions along with its small electron heat capacity makes graphene an ideal material for applications in ultra-fast and sensitive hot electron bolometer. However, a major issue is that the resistance of pristine graphene weakly depends on the electronic temperature. We propose using disordered graphene to obtain a strongly temperature dependent resistance. The measured electrical responsivity of the disordered graphene bolometer reaches 6 × 10 6  V/W at 1.5 K, corresponding to an optical responsivity of 1.6 × 10 5  V/W. The deduced electrical noise equivalent power is 1.2 , corresponding to the optical noise equivalent power of 44  . The minimal device structure and no requirement for high mobility graphene make a step forward towards the applications of graphene hot electron bolometers.

• Publisher: Nature Publishing Group UK,Nature Publishing Group
• Subject: 639/301/119/544 / 639/925/918/1052 / Electrodes / Electromagnetic radiation / Gases / Graphene / Heat resistance / Humanities and Social Sciences / Localization / Magnetic fields / multidisciplinary / Noise / Science / Temperature effects