TY - JOUR
T1 - Reversible modulation and ultrafast dynamics of terahertz resonances in strongly photoexcited metamaterials
AU - Chatzakis, I.
AU - Luo, L.
AU - Wang, J.
AU - Shen, N. H.
AU - Koschny, T.
AU - Zhou, J.
AU - Soukoulis, C. M.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/9/7
Y1 - 2012/9/7
N2 - We demonstrate an ultrafast reversible modulation of resonant terahertz (THz) response in strongly photoexcited metamaterials. The transient spectral-temporal response of the dipole transition ∼1.6 THz exhibits a distinct nonmonotonic variation as a function of pump fluence. The transition energy shift, strength, spectral width, and density-dependent ultrafast relaxation manifest a remarkable reemergence of the transmission dip after initial quenching. Our simulations, incorporating the first-order diffraction from the photoinduced transient grating, reproduce the salient features, providing a new avenue for designing nonlinear and frequency-agile THz modulators.
AB - We demonstrate an ultrafast reversible modulation of resonant terahertz (THz) response in strongly photoexcited metamaterials. The transient spectral-temporal response of the dipole transition ∼1.6 THz exhibits a distinct nonmonotonic variation as a function of pump fluence. The transition energy shift, strength, spectral width, and density-dependent ultrafast relaxation manifest a remarkable reemergence of the transmission dip after initial quenching. Our simulations, incorporating the first-order diffraction from the photoinduced transient grating, reproduce the salient features, providing a new avenue for designing nonlinear and frequency-agile THz modulators.
UR - http://www.scopus.com/inward/record.url?scp=84866407376&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.125110
DO - 10.1103/PhysRevB.86.125110
M3 - Article
AN - SCOPUS:84866407376
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 12
M1 - 125110
ER -