Total light absorption in graphene
Optics
2012-11-13 v1 Mesoscale and Nanoscale Physics
Materials Science
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.
Cite
@article{arxiv.1106.4460,
title = {Total light absorption in graphene},
author = {Sukosin Thongrattanasiri and Frank H. L. Koppens and F. Javier Garcia de Abajo},
journal= {arXiv preprint arXiv:1106.4460},
year = {2012}
}
Comments
4 figures