Light in time varying media

We study light propagation in complex time varying environments. Mie light scattering theory was generalized to scattering from spherical and non spherical particles with periodically time varying dielectric functions. Multiple scattering theory was also generalized of to describe light propagation through time and space periodic structures.

References

E Panagiotidis, E Almpanis, N Papanikolaou, N Stefanou, Optical Transitions and Nonreciprocity in Spatio‐Temporally Periodic Layers of Spherical Particles, Advanced Optical Materials 11 (12), 2202812.

E Panagiotidis, E Almpanis, N Papanikolaou, N Stefanou, Inelastic light scattering from a dielectric sphere with a time-varying radius, Physical Review A 106 (1), 013524.

P. Garg, A. G. Lamprianidis, S. Rahman, N. Stefanou, E. Almpanis, N. Papanikolaou, B. Verfürth, and C. Rockstuhl, "Two-step homogenization of spatiotemporal metasurfaces using an eigenmode-based approach," Opt. Mater. Express 14, 549-563 (2024).

N Stefanou, I Stefanou, E Almpanis, N Papanikolaou, P Garg, C Rockstuhl “Light scattering by a periodically time-modulated object of arbitrary shape: the extended boundary condition method, JOSA B 40 (11), 2842-2850.