Total light absorption in graphene

Details Total light absorption in graphene Total light absorption in graphene

2011-06-22

arxiv.org/abs/1106.4460v1

Physical Review Letters 108, 047401 (2012)

Physics

Optics

4 figures

Scientific paper

10.1103/PhysRevLett.108.047401

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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