%0 Journal Article
%A Emelianov, Aleksei V.
%A Kireev, Dmitry
%A Offenhäusser, Andreas
%A Otero, Nerea
%A Romero, Pablo M.
%A Bobrinetskiy, Ivan I.
%T Thermoelectrically Driven Photocurrent Generation in Femtosecond Laser Patterned Graphene Junctions
%J ACS photonics
%V 5
%N 8
%@ 2330-4022
%C Washington, DC
%I ACS
%M FZJ-2018-07165
%P 3107 - 3115
%D 2018
%X Single and few-layer graphene photodetectors have attracted much attention in the past few years. Pristine graphene shows a very weak response to visible light; hence, fabrication of complex graphene-based detectors is a challenging task. In this work, we utilize the ultrafast laser functionalization of single-layer CVD graphene for highly desirable maskless fabrication of micro- and nanoscale devices. We investigate the optoelectronic response of pristine and functionalized devices under femtosecond and continuous wave lasers irradiation. We demonstrate that the photocurrent generation in p–p+ junctions formed in single-layer graphene is related to the photothermoelectric effect. The photoresponsivity of our laser patterned single-layer graphene junctions is shown to be as high as 100 mA/W with noise equivalent power less than 6 kW/cm2. These results open a path to a low-cost maskless technology for fabrication of graphene-based optoelectronic devices with tunable properties for spectroscopy, signal processing, and other applications.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000442185900019
%R 10.1021/acsphotonics.8b00350
%U https://juser.fz-juelich.de/record/858274