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Perturbative Born theory for light scattering by time-modulated scatterers
Dionysios Galanis, Evangelos Almpanis, Nikolaos Papanikolaou +1
We present a theoretical framework for electromagnetic scattering by particles with a permittivity that is periodically varying in time, based on a perturbative approach. Within th…
Photonic time crystals assisted by quasi-bound states in the continuum
P. Garg, E. Almpanis, L. Zimmer +8
Photonic time crystals (PTCs) are characterized by the rapid modulation of the material properties in time, causing a momentum bandgap for light. However, the observation of these…
Designing Si sphere metagratings: From perfect reflection to large-angle diffraction
Evangelos Almpanis, Emmanouil Panagiotidis, Nikolaos Stefanou +1
A thorough theoretical study of the optical properties of periodic Si nanosphere arrays is undertaken, placing particular emphasis on the synergy between electric and magnetic Mie…