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physics.optics2022
Resonance-enhanced spectral funneling in Fabry-Perot resonators with a temporal boundary mirror
Kanghee Lee, Junho Park, Seojoo Lee +4
A temporal boundary refers to a specific time at which the properties of an optical medium are abruptly changed. When light interacts with the temporal boundary, its spectral conte…
physics.optics2017
Linear frequency conversion via sudden merging of resonances in time-variant metasurfaces
Kanghee Lee, Jaehyeon Son, Jagang Park +4
Energy conversion in a physical system requires time-translation invariance breaking according to Noether's theorem. Closely associated with this symmetry-conservation relation, th…
physics.optics2013★ 18 cited
Gigahertz repetition rate, sub-femtosecond timing jitter optical pulse train directly generated from a mode-locked Yb:KYW laser
Heewon Yang, Hyoji Kim, Junho Shin +5
We show that a 1.13-GHz repetition rate optical pulse train with 0.70 fs high-frequency timing jitter (integration bandwidth of 17.5 kHz - 10 MHz, where the measurement instrument-…