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Microcavity-integrated graphene photodetector


Furchi, M; Urich, A; Pospischil, A; Lilley, G; Unterrainer, K; Detz, H; Klang, P; Andrews, A M; Schrenk, W; Strasser, G; Mueller, T (2012). Microcavity-integrated graphene photodetector. Nano letters, 12(6):2773-2777.

Abstract

There is an increasing interest in using graphene (1, 2) for optoelectronic applications. (3-19) 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.

Abstract

There is an increasing interest in using graphene (1, 2) for optoelectronic applications. (3-19) 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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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Veterinary Pathology
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2012
Deposited On:21 Feb 2013 14:32
Last Modified:07 Dec 2017 19:50
Publisher:American Chemical Society
ISSN:1530-6984
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1021/nl204512x
PubMed ID:22563791

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