A team at the Institute of Physical Chemistry "Rocasolano" in Madrid predicts that graphene – a layer of carbon just one atom thick – could be used to create a perfect absorber of light if it is doped and patterned into a periodic array. The work could lead to improved light-detection devices, particularly in the infrared part of the electromagnetic spectrum, where current technologies struggle to function.

Reference:Complete Optical Absorption in Periodically Patterned Graphene

http://physics.aps.org/articles/v5/12
http://nanotechweb.org/cws/article/tech/48463
http://physicsworld.com/cws/article/news/48464