Microcavity-Integrated Graphene Photodetector
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- 作者：Marco Furchi ; Alexander Urich ; Andreas Pospischil ; Govinda Lilley ; Karl Unterrainer ; Hermann Detz ; Pavel Klang ; Aaron Maxwell Andrews ; Werner Schrenk ; Gottfried Strasser ; Thomas Mueller
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：June 13, 2012
- 年：2012
- 卷：12
- 期：6
- 页码：2773-2777
- 全文大小：284K
- 年卷期：v.12,no.6(June 13, 2012)
- ISSN：1530-6992
文摘
There is an increasing interest in using graphenethis, 'ref1 ref2'); return false;" href="JavaScript:void(0);" class="ref">(1, 2) for optoelectronic applications.this, 'ref3 ref4 ref5 ref6 ref7 ref8 ref9 ref10 ref11 ref12 ref13 ref14 ref15 ref16 ref17 ref18 ref19'); return false;" href="JavaScript:void(0);" class="ref">(3-19) However, because graphene is an inherently weak optical absorber (only 鈮?.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-P茅rot 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.