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Parametric Mie resonances and directional amplification in time-modulated scatterers

Asadchy, V.; Lamprianidis, A. G. 1; Ptitcyn, G.; Albooyeh, M.; Karamanos, T. 1; Alaee, R. 1; Tretyakov, S. A.; Rockstuhl, C. 1,2; Fan, S.
1 Institut für Theoretische Festkörperphysik (TFP), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


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 control of the temporal modulation strength provides a qualitatively new route to tailor the far-field pattern of a scatterer. Two characteristic spheres are designed, providing amplification of scattered light and satisfying nearly ideally the first and second Kerker scattering conditions.

DOI: 10.48550/arXiv.2202.11138
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Karlsruhe School of Optics & Photonics (KSOP)
Publikationstyp Forschungsbericht/Preprint
Publikationsdatum 22.02.2022
Sprache Englisch
Identifikator KITopen-ID: 1000144726
Umfang 6 S.
Nachgewiesen in arXiv
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