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arXiv · 1106.4460

Total light absorption in graphene

Sukosin Thongrattanasiri·Frank H. L. Koppens·F. Javier Garcia de Abajo
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Abstract

We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small lossy particles exhibits full absorption under critical-coupling conditions provided the cross section of each individual particle is comparable to the area of the lattice unit-cell. Specifically, arrays of doped graphene nanodisks display full absorption when supported on a substrate under total internal reflection, and also when lying on a dielectric layer coating a metal. Our results are relevant for infrared light detectors and sources, which can be made tunable via electrostatic doping of graphene.

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Sukosin Thongrattanasiri, Frank H. L. Koppens, F. Javier Garcia de Abajo. 2011-06-22. Total light absorption in graphene. https://doi.org/10.1103/physrevlett.108.047401

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