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Ultrafast Dephasing of Coherent Intersubband Polarizations in a Quasi-Two-Dimensional Electron Plasma

Title data

Kaindl, Robert A. ; Lutgen, Stephan ; Woerner, Michael ; Elsaesser, Thomas ; Nottelmann, Bernd ; Axt, Vollrath M. ; Kuhn, Tilmann ; Hase, Andreas ; Künzel, Harald:
Ultrafast Dephasing of Coherent Intersubband Polarizations in a Quasi-Two-Dimensional Electron Plasma.
In: Physical Review Letters. Vol. 80 (1998) Issue 16 . - pp. 3575-3578.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.80.3575

Abstract in another language

We present the first study of coherent intersubband polarizations in a pure electron plasma by femtosecond four-wave mixing in the midinfrared. Resonantly excited polarizations between consecutive conduction subbands of narrow GaInAs/AlInAs quantum wells decay within about 500 fs, much faster than intersubband relaxation of electrons. The relation between the decay rate of the signals and the dephasing rate is analyzed by solving the time-dependent Hartree-Fock equations for the single-particle density matrix. Electron-electron scattering is identified as the main dephasing mechanism.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: intersubband dynamics; quasi-two-dimensional electron plasma; laser excitation; ultrafast dynamics; non-linear optics; intersubband transitions; Quantum wells; many-body effects
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 17 Oct 2017 08:28
Last Modified: 17 Oct 2017 08:28
URI: https://eref.uni-bayreuth.de/id/eprint/40026