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Multifunctional Graphene Optical Modulator and Photodetector Integrated on Silicon Waveguides

2014; American Chemical Society; Volume: 14; Issue: 5 Linguagem: Inglês

10.1021/nl500712u

1530-6992

Nathan Youngblood, Yoska Anugrah, Rui Ma, Steven J. Koester, Mo Li,

Plasmonic and Surface Plasmon Research

Graphene's unique optoelectronic properties have been exploited for many photonic applications. Here, we demonstrate a single graphene-based device that simultaneously provides efficient optical modulation and photodetection. The graphene device is integrated on a silicon waveguide and is tunable with a graphene gate to achieve a near-infrared photodetection responsivity of 57 mA/W and modulation depth of 64% with GHz bandwidth. Simultaneous modulation of photocurrent and optical transmission has been achieved, which may lead to unprecedented optoelectronic applications.