A paper originating from a collaboration between N4E partners CSIC, ICFO and University of Southampton suggests doped graphene could be a perfect light absorber.
The authors demonstrate 100% light absorption can take place in a single patterned sheet of doped graphene. The results are relevant for infrared light detectors and sources, and have been highlighted in Physics Focus and Physics World
Phys. Rev. Lett. 108, 047401 (2012): Complete Optical Absorption in Periodically Patterned Graphene