Coherent perfect absorption in deeply subwavelength films in the single-photon regime

Thomas Roger, Stefano Vezzoli, Eliot Bolduc, Joao Valente, Julius J. F. Heitz, John Jeffers, Cesare Soci, Jonathan Leach, Christophe Couteau, Nikolay I. Zheludev, Daniele Faccio

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168 Citations (Scopus)
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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.
Original languageEnglish
Article number7031
JournalNature Communications
Publication statusPublished - 20 May 2015


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