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Scattering of light by spheres made from a time-modulated and dispersive material

Ptitcyn, G.; Lamprianidis, A. ORCID iD icon; Karamanos, T.; Muller, M.; Alaee, R.; Asadchy, V. S.; Mirmoosa, M. S.; Albooyeh, M.; Fan, S.; Rockstuhl, C.; Tretyakov, S. A.


Exploring the interaction of light with time-varying media is an intellectual challenge that, in addition to fundamental aspects, provides a pathway to multiple promising applications. Time modulation constitutes here a fundamental handle to control light on entirely different grounds. That holds particularly for complex systems simultaneously structured in space and time. However, a realistic description of time-varying materials requires considering their material dispersion. The combination thereof has barely been considered but is crucial since dispersion accompanies materials suitable for dynamic modulation. As a canonical scattering problem from which many general insights can be obtained, we develop and apply a self-consistent analytical theory of light scattering by a sphere made from a time-varying material exemplarily assumed to have a Lorentzian dispersion. We discuss the eigensolutions of Maxwell's equations in the bulk and present a dedicated Mie theory. The proposed theory is verified with full-wave simulations. We disclose effects such as energy transfer from the time-modulation subsystem to the electromagnetic field, amplifying carefully structured incident fields. ... mehr

Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Forschungsbericht/Preprint
Publikationsdatum 14.10.2021
Sprache Englisch
Identifikator KITopen-ID: 1000140433
Umfang 18 S.
Nachgewiesen in arXiv
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