Parametric Mie Resonances and Directional Amplification in Time-Modulated Scatterers

V. Asadchy, A.G. Lamprianidis, G. Ptitcyn, M. Albooyeh, Rituraj Rituraj, T. Karamanos, R. Alaee, S.A. Tretyakov, C. Rockstuhl, S. Fan

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

17 Sitaatiot (Scopus)

Abstrakti

We provide a theoretical description of light scattering by a spherical particle whose permittivity is modulated in time at twice the frequency of the incident light. Such a particle acts as a finite-sized photonic time crystal and, despite its sub-wavelength spatial extent, can host optical parametric amplification. Conditions of parametric Mie resonances in the sphere are derived. We show that time-modulated materials provide a route to tailor directional light amplification, qualitatively different from that in scatterers made from a gain media. We design two characteristic time-modulated spheres that simultaneously exhibit light amplification and desired radiation patterns, including those with zero backward and/or vanishing forward scattering. The latter sphere provides an opportunity for creating shadow-free detectors of incident light.
AlkuperäiskieliEnglanti
Artikkeli054065
Sivumäärä8
JulkaisuPhysical Review Applied
Vuosikerta18
Numero5
DOI - pysyväislinkit
TilaJulkaistu - 1 marrask. 2022
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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