TY - JOUR
T1 - Wigner time delay induced by a single quantum dot
AU - Strauss, Max
AU - Carmele, Alexander
AU - Schleibner, Julian
AU - Hohn, Marcel
AU - Schneider, Christian
AU - Höfling, Sven
AU - Wolters, Janik
AU - Reitzenstein, Stephan
N1 - The research leading to these results has received funding from the European Research Council (ERC) under the European Union's Seventh Framework ERC Grant
Agreement No. 615613 and from the German Research Foundation Project (DFG) No. RE2974/5-1. A.C. and J.S. gratefully acknowledge the support by the DFG
through project B1 of the SFB 910. The Wurzburg group is grateful for support by the State of Bavaria.
PY - 2019/3/13
Y1 - 2019/3/13
N2 - Resonant scattering of weak coherent laser pulses on a single two-level system (TLS) realized in a semiconductor quantum dot is investigated with respect to a time delay between incoming and scattered light. This type of time delay was predicted by Wigner in 1955 for purely coherent scattering and was confirmed for an atomic system in 2013 [R. Bourgain et al., Opt. Lett. 38, 1963 (2013)]. In the presence of electron-phonon interaction we observe deviations from Wigner’s theory related to incoherent and strongly non-Markovian scattering processes which are hard to quantify via a detuning-independent pure dephasing time. We observe detuning-dependent Wigner delays of up to 530 ps in our experiments which are supported quantitatively by microscopic theory allowing for pure dephasing times of up to 950 ps.
AB - Resonant scattering of weak coherent laser pulses on a single two-level system (TLS) realized in a semiconductor quantum dot is investigated with respect to a time delay between incoming and scattered light. This type of time delay was predicted by Wigner in 1955 for purely coherent scattering and was confirmed for an atomic system in 2013 [R. Bourgain et al., Opt. Lett. 38, 1963 (2013)]. In the presence of electron-phonon interaction we observe deviations from Wigner’s theory related to incoherent and strongly non-Markovian scattering processes which are hard to quantify via a detuning-independent pure dephasing time. We observe detuning-dependent Wigner delays of up to 530 ps in our experiments which are supported quantitatively by microscopic theory allowing for pure dephasing times of up to 950 ps.
U2 - 10.1103/PhysRevLett.122.107401
DO - 10.1103/PhysRevLett.122.107401
M3 - Article
SN - 0031-9007
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 107401
ER -