22 February 2013 Metal-graphene-metal photodetectors
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We present photoconductivity studies of metal/graphene interfaces, discuss the origin of the photoconductive behavior, and present ultrafast photocurrent measurements. Conversion of surface plasmon polaritons into electrical current at metal/graphene interfaces will also be presented. Based on these findings we developed several concepts for graphenebased photodetectors. One of these concepts involves the deposition of inter-digitated metal electrodes on graphene to realize a metal-graphene-metal photodetector. We used this device to demonstrate the faithful detection of data streams at rates of 10 gigabits per second. Another concept relies on the monolithic integrating of graphene with a Fabry-Pérot microcavity. This device benefits from the large increase of the optical field inside a resonant cavity, giving rise to increased absorption. We demonstrate that the optical absorption can be 26-fold enhanced as compared to conventional devices.
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Thomas Mueller, Thomas Mueller, Marco Furchi, Marco Furchi, Alexander Urich, Alexander Urich, Andreas Pospischil, Andreas Pospischil, "Metal-graphene-metal photodetectors", Proc. SPIE 8600, Laser Resonators, Microresonators, and Beam Control XV, 86001H (22 February 2013); doi: 10.1117/12.2001886; https://doi.org/10.1117/12.2001886

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