Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Physics



+44 (0)20 7594 9577r.sapienza Website




B913Blackett LaboratorySouth Kensington Campus





Lasing networkWe aim to understand and control the light generated in nanoscale and time-varying metamaterials by individual emitters and unconventional lasing systems, with application in reconfigurable photonic devices and quantum optics.
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Selected Publications

Journal Articles

Tirole R, Vezzoli S, Galiffi E, et al., 2023, Double-slit time diffraction at optical frequencies, Nature Physics, Vol:19, ISSN:1745-2473, Pages:999-+

Sapienza R, Barahona M, Saxena D, et al., 2022, Sensitivity and spectral control of network lasers, Nature Communications, Vol:13, ISSN:2041-1723, Pages:1-7

Trivedi M, Saxena D, Ng WK, et al., 2022, Self-organized lasers from reconfigurable colloidal assemblies, Nature Physics, Vol:18, ISSN:1745-2473, Pages:939-+

Galiffi E, Tirole R, Yin S, et al., 2022, Photonics of time-varying media, Advanced Photonics, Vol:4

Sortino L, Zotev PG, Phillips CL, et al., 2021, Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas, Nature Communications, Vol:12, ISSN:2041-1723

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