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physics.optics2026
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…
physics.optics2026
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…