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Terahertz nonlinear optics using intra‐excitonic quantum well transitions: Sideband generation and AC Stark splitting
Author(s) -
Wagner Martin,
Schneider Harald,
Stehr Dominik,
Winnerl Stephan,
Andrews Aaron M.,
Schartner Stephan,
Strasser Gottfried,
Helm Manfred
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201000832
Subject(s) - sideband , terahertz radiation , physics , laser , stark effect , narrowband , quantum well , exciton , far infrared laser , optoelectronics , nonlinear optics , terahertz spectroscopy and technology , optics , condensed matter physics , electric field , quantum mechanics , microwave
We present experiments investigating nonlinear optics in the terahertz (THz) range related to the 1s–2p intra‐excitonic heavy‐hole transition in GaAs/AlGaAs multiquantum wells (MQWs). Driven by intense THz fields of the Dresden free‐electron laser the system exhibits two different phenomena: (i) we observe efficient near‐infrared (NIR) sideband generation as a perturbative effect in the transmission of a narrowband NIR laser, and (ii) we present unambiguous evidence for the intra‐excitonic Autler–Townes splitting, a non‐perturbative effect.