Coherent control of light interaction with graphene

We report the experimental observation of all-optical modulation of light in a graphene film. The graphene film is scanned across a standing wave formed by two counter-propagating laser beams in a Sagnac interferometer. Through a coherent absorption process the on-axis transmission is modulated with...

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Bibliographic Details
Published inarXiv.org
Main Authors Rao, Shraddha M, Heitz, Julius J F, Thomas, Roger, Westerberg, Niclas, Faccio, Daniele
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 11.08.2014
Subjects
Graphene
Laser beams
Mapping
Modulation
Optical communication
Physics - Optics
Standing waves
Wave propagation
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Summary:We report the experimental observation of all-optical modulation of light in a graphene film. The graphene film is scanned across a standing wave formed by two counter-propagating laser beams in a Sagnac interferometer. Through a coherent absorption process the on-axis transmission is modulated with close to 80% efficiency. Furthermore we observe modulation of the scattered energy by mapping the off-axis scattered optical signal: scattering is minimized at a node of the standing wave pattern and maximized at an antinode. The results highlight the possibility to switch and modulate any given optical interaction with deeply sub-wavelength films.
ISSN:2331-8422
DOI:10.48550/arxiv.1406.6217