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arXiv · 1406.6217

Coherent control of light interaction with graphene

Shraddha M. Rao·Julius J. F. Heitz·Thomas Roger·Niclas Westerberg·Daniele Faccio
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Abstract

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.

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Shraddha M. Rao, Julius J. F. Heitz, Thomas Roger, Niclas Westerberg, Daniele Faccio. 2014-06-24. Coherent control of light interaction with graphene. https://doi.org/10.1364/ol.39.005345

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