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physics.optics2025
Analogs of spontaneous emission and lasing in photonic time crystals
Kyungmin Lee, Minwook Kyung, Yung Kim +7
We report the first direct mapping of the frequency-resolved local density of states (LDOS) in a photonic time crystal (PTC) implemented as an array of time-periodically modulated…
physics.app-ph2025
Boundary-Driven Complex Brillouin Zone in Non-Hermitian Electric Circuits
Yung Kim, Sonu Verma, Minwook Kyung +5
Complex-valued physical quantities, often non-conserved, represent key phenomena in non-Hermitian systems such as dissipation and localization. Recent advancements in non-Hermitian…