Authors
Thomas Roger, Stefano Vezzoli, Eliot Bolduc, Joao Valente, Julius Heitz, Jeff Jeffers, Cesare Soci, Jonathan Leach, Christophe Couteau, Nikolay Zheludev, Daniele Faccio.,
Title
Coherent perfect absorption in deeply subwavelength films in the single photon regime
In
Nature Communications
Volume
6
Pages
7031
Year
2015
Indexed by
Abstract
The technologies of heating, photovoltaics, water photocatalysis and artificial photosynthesis depend on the absorption of light and novel approaches such as coherent absorption from a standing wave promise total dissipation of energy. Extending the control of absorption down to very low light levels and eventually to the single-photon regime is of great interest and yet remains largely unexplored. Here we demonstrate the coherent absorption of single photons in a deeply subwavelength 50% absorber. We show that while the absorption of photons from a travelling wave is probabilistic, standing wave absorption can be observed deterministically, with nearly unitary probability of coupling a photon into a mode of the material, for example, a localized plasmon when this is a metamaterial excited at the plasmon resonance. These results bring a better understanding of the coherent absorption process, which is of central importance for light harvesting, detection, sensing and photonic data processing applications.
Affiliations
Offprint