Multifunctional graphene optical modulator and photodetector integrated on silicon waveguides

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

Research output: Contribution to journalArticlepeer-review

220 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2741-2746
Number of pages6
JournalNano letters
Issue number5
StatePublished - May 14 2014


  • Graphene
  • nanophotonics
  • optoelectronics
  • photodetection
  • photonic integration


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