Microcavity-integrated graphene photodetector.
Microcavity-integrated graphene photodetector.
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DOI:
10.1021/nl204512x
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发表时间:
2012-06-13
期刊:
影响因子:
10.8
通讯作者:
Mueller T
中科院分区:
文献类型:
--
作者:
Furchi M;Urich A;Pospischil A;Lilley G;Unterrainer K;Detz H;Klang P;Andrews AM;Schrenk W;Strasser G;Mueller T
There is an increasing interest in using graphene for optoelectronic applications.− However, because graphene is an inherently weak optical absorber (only ≈2.3% absorption), novel concepts need to be developed to increase the absorption and take full advantage of its unique optical properties. We demonstrate that by monolithically integrating graphene with a Fabry-Pérot microcavity, the optical absorption is 26-fold enhanced, reaching values >60%. We present a graphene-based microcavity photodetector with responsivity of 21 mA/W. Our approach can be applied to a variety of other graphene devices, such as electro-absorption modulators, variable optical attenuators, or light emitters, and provides a new route to graphene photonics with the potential for applications in communications, security, sensing and spectroscopy.
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