Intrinsic response time of graphene photodetectors
arXiv:1105.3123 · doi:10.1021/nl2011388
Abstract
Graphene-based photodetectors are promising new devices for high-speed optoelectronic applications. However, despite recent efforts, it is not clear what determines the ultimate speed limit of these devices. Here, we present measurements of the intrinsic response time of metal-graphene-metal photodetectors with monolayer graphene using an optical correlation technique with ultrashort laser pulses. We obtain a response time of 2.1 ps that is mainly given by the short lifetime of the photogenerated carriers. This time translates into a bandwidth of ~262 GHz. Moreover, we investigate the dependence of the response time on gate voltage and illumination laser power.
References in corpus (7)
- The electronic properties of graphene
- The Raman Fingerprint of Graphene
- Graphene photodetectors for high-speed optical communications
- Graphene-Based Liquid Crystal Device
- Ultrafast Photoluminescence from Graphene
- Carrier Recombination and Generation Rates for Intravalley and Intervalley Phonon Scattering in Graphene
- Electron-Hole Generation and Recombination Rates for Coulomb Scattering in Graphene
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