6 citations · 10 across the 8 of their papers we have counts for
9 papers
Quantum Photonic Time Crystals: From Temporal Boundaries to Floquet Light-Matter Interactions
Younsung Kim, Kyungmin Lee, Kun Woo Kim +1
Photonic time crystals (PTCs) are temporally periodic media whose Floquet spectra can exhibit momentum gaps, parametric amplification, and effective non-Hermitian descriptions, mak…
Self-organized photonic time quasicrystal from a single imposed clock
Minwook Kyung, Kyungmin Lee, Yung Kim +3
A photonic time crystal usually writes a clock into a medium. Here one clock does more than program the medium: it seeds a quasiperiodic temporal order that the nonlinear medium se…
Energy Transport Velocity in Photonic Time Crystals
Kyungmin Lee, Younsung Kim, Kun Woo Kim +1
Steep or near-vertical Floquet dispersion in photonic time crystals (PTCs) is often read as fast, even apparently superluminal, transport. Here, we demonstrate that this anomaly ar…
Classical Petermann Factor as a Measure of Quantum Squeezing in Photonic Time Crystals
Younsung Kim, Kyungmin Lee, Changhun Oh +3
Photonic time crystals realize a continuum of momentum-resolved SU(1,1) parametric amplifiers. We show that a classical quantity, the Petermann factor of the effective Floquet Bogo…
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…
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…
Cavity quantum electrodynamics of photonic temporal crystals
Junhyeon Bae, Kyungmin Lee, Bumki Min +1
Photonic temporal crystals host a variety of intriguing phenomena, from wave amplification and mixing to exotic band structures, all stemming from the time-periodic modulation of o…
Spontaneous emission decay and excitation in photonic time crystals
Jagang Park, Kyungmin Lee, Ruo-Yang Zhang +10
Over the last few decades, the predominant strategies for controlling spontaneous emission have involved tailoring the spatial surroundings of quantum emitters or atoms to create r…
Revealing non-Hermitian band structures of photonic Floquet media
Jagang Park, Hyukjoon Cho, Seojoo Lee +7
Periodically driven systems, characterised by their inherent non-equilibrium dynamics, are ubiquitously found in both classical and quantum regimes. In the field of photonics, thes…