title: Highly sensitive hot electron bolometer based on disordered graphene.
abstract: 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 fW/√Hz, corresponding to the optical noise equivalent power of 44 fW/√Hz. The minimal device structure and no requirement for high mobility graphene make a step forward towards the applications of graphene hot electron bolometers.
authors.affiliation: 1] State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Han
authors.affiliation: College of Chemical and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Teng
authors.initials: T
authors.lastname: Gao
authors.affiliation: 1] State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Chen
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Chen
authors.affiliation: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China.
authors.forename: Gerui
authors.initials: G
authors.lastname: Liu
authors.affiliation: College of Chemical and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Chemical and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Zhongfan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: 1] State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Wu
authors.affiliation: 1] State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors.forename: Dapeng
authors.initials: D
authors.lastname: Yu