Τίτλος:
Optical Transitions and Nonreciprocity in Spatio-Temporally Periodic Layers of Spherical Particles
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
An extension of the photonic layer multiple scattering methodology to dynamic spherical scatterers, which exhibit a periodic time-varying response, is presented. The applicability of the method is demonstrated on specific examples of single- and bi-layers of periodically modulated high-refractive-index spherical particles arranged on a square lattice. The results provide compelling evidence for strong and tunable inelastic scattering effects under the triple resonance condition, fulfilled for optical transitions between neighboring high-Q lattice modes of the appropriate symmetry, which originate from multipolar Mie resonances. A consistent interpretation of the underlying mechanisms is provided and potential applications in the design of nonreciprocal devices are discussed. © 2023 Wiley-VCH GmbH.
Συγγραφείς:
Panagiotidis, E.
Almpanis, E.
Papanikolaou, N.
Stefanou, N.
Περιοδικό:
Advanced Optical Materials
Εκδότης:
John Wiley and Sons Inc
Λέξεις-κλειδιά:
Crystals; Inelastic scattering; Multiple scattering; Optical lattices; Spheres, Floquet; Metasurface; Multiple scattering method; Nonreciprocal; Nonreciprocal optical response; Optical response; Space-time floquet crystal; Spacetime; Time varying; Time-varying metasurface, Refractive index
DOI:
10.1002/adom.202202812
