Multifunctional graphene optical modulator and photodetector integrated on silicon waveguides.
basic_science · Level V
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- Record sourced from PubMed, PMID 24734877.
- Also identified by DOI 10.1021/nl500712u.
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Abstract
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.