Inter-sublevel dephasing in quantum dots
Inter-sublevel dephasing in quantum dots
Teich, M.; Schneider, H.; Bhattacharyya, J.; Winnerl, S.; Wilson, L.; Helm, M.
Abstract
We use the Dresden Free-Electron-Laser (FELBE) to investigate intersublevel coherence times in semiconductor quantum dots (QDs) by degenerate four-wave mixing (DFWM) spectroscopy. We know from pump-probe measurements1 on a series of quantum dot samples with varying intersublevel energy that intersublevel relaxation times of the s-p intersublevel transition can become very long (up to 1.5 ns). Due to the discrete nature of these sublevels, intersublevel coherence times should exhibit similar time constants at low temperatures where “pure dephasing” is suppressed.
Keywords: semiconductor quantum dot; inter-sublevel transition; terahertz free-electron laser; degenerate four-wave mixing; homogeneous and inhomogeneous broadening
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 19666) publication
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Contribution to proceedings
38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013), 01.-06.09.2013, Mainz, Deutschland: IEEE Xplore Digital Library
DOI: 10.1109/IRMMW-THz.2013.6665455 -
Poster
38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013), 01.-06.09.2013, Mainz, Deutschland
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