5 papers
Symmetry classification of temporal reciprocity in time-varying electromagnetic media
Seulong Kim, Kihong Kim
Time-varying electromagnetic media exhibit rich nonstationary wave phenomena, but the symmetry governing reversal of arbitrary temporal modulation sequences has remained unclear. W…
Disorder-enabled directional delocalization and wave steering in time-modulated Dirac materials
Seulong Kim, Kihong Kim
We demonstrate a disorder-enabled yet localization-immune directional transport channel in time-modulated Dirac systems subject to stochastic temporal variations of a vector potent…
Statistical regimes of electromagnetic wave propagation in randomly time-varying media
Seulong Kim, Kihong Kim
Wave propagation in time-varying media enables unique control of energy transport by breaking energy conservation through temporal modulation. Among the resulting phenomena, tempor…
Deterministic time rewinding of waves in time-varying media
Seulong Kim, Kihong Kim
Temporal modulation of material parameters offers unprecedented control over wave dynamics, enabling phenomena beyond the capabilities of static systems. Here we introduce and anal…
Spatial localization and diffusion of Dirac particles and waves induced by random temporal medium variations
Seulong Kim, Kihong Kim
Wave propagation in time-varying media has attracted significant attention for its innovative potential to control wave-matter interactions and to develop versatile active material…