Riccardo Sapienza

@riccard0.bsky.social

Professor of Physics at Imperial College London, exploring light at the nanoscale, trying to make sense of the world, nanophotonic enthusiast - proud dad of 2

News from the lab! 🤩 Is it possible to switch a material from being an absorber to an amplifier just by changing the phase of light? By treating a thin film of ITO as a time-varying medium, we achieved 400% amplification and 80% absorption within the same structure. www.nature.com/articles/s41...

Optical coherent perfect absorption and amplification in a time-varying medium - Nature Photonics

The researchers show that a subwavelength film of indium tin oxide, the bulk permittivity of which is strategically modulated via optical pumping, can be dynamically tuned to act as both a non-resonan...

nature.com