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@article{Koufidis:2024:10.1103/PhysRevA.110.L041501,
author = {Koufidis, SF and Koutserimpas, TT and Monticone, F and McCall, MW},
doi = {10.1103/PhysRevA.110.L041501},
journal = {Physical Review A},
title = {Enhanced scattering from an almost-periodic optical temporal slab},
url = {http://dx.doi.org/10.1103/PhysRevA.110.L041501},
volume = {110},
year = {2024}
}
TY - JOUR
AB - We showcase the impact of almost-periodicity on the parametric amplification associated with the first-order momentum gap in photonic time-crystals with time-varying permittivity. Utilizing a vectorial coupled-wave theory approach, we rigorously analyze the scattering by a temporal slab of the considered medium. We pinpoint a critical regime wherein flaws in material tuning paradoxically enhance amplification due to the coupling of fewer, broader modes, resulting in a higher and broader pulselike amplification envelope. Additionally, we demonstrate that the intensity reflectances of time-reversed waves corresponding to secondary "Bragg"resonances achieve remarkably high levels of subharmonic parametric amplification, with the epsilon-near-zero regime serving as a preferred candidate for experimental implementation. Our counterintuitive findings highlight the potential of intentionally leveraging modulation desynchronization and impurities in the temporal unit cell of photonic time-crystals to enhance both the level and the bandwidth of amplification.
AU - Koufidis,SF
AU - Koutserimpas,TT
AU - Monticone,F
AU - McCall,MW
DO - 10.1103/PhysRevA.110.L041501
PY - 2024///
SN - 2469-9926
TI - Enhanced scattering from an almost-periodic optical temporal slab
T2 - Physical Review A
UR - http://dx.doi.org/10.1103/PhysRevA.110.L041501
VL - 110
ER -