6 citations · 15 across the 12 of their papers we have counts for
13 papers
Thouless Pumping of Wave Action in Photonic Time Crystals
Minwook Kyung, Younsung Kim, Kyungmin Lee +3
A topological pump transports a conserved quantity. Yet temporal modulation exchanges energy with the field, so the transported quantity must be identified from Maxwell's equations…
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…
Sagnac-Loop-Reflector Fabry-Perot Lattices for Modular 1D Topological Photonics
Siwoo Kim, Yung Kim, Semin Choi +5
We introduce a modular silicon-photonic Fabry-Perot resonator lattice based on cascaded tunable Sagnac loop reflectors. Each SLR is controlled by a single directional-coupler cross…
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…