Dephasing of Bloch oscillations due to carrier-carrier scattering: Coherent versus incoherent scatterers

F. Wolter, R. Martini, S. Tolk, H. T. Grahn, R. Hey, P. Haring Bolivar, H. Kurz

Research output: Contribution to conferencePaperpeer-review

Abstract

An approach employed for the investigation of the dephasing of interband dynamics in four wave mixing is used to study the dephasing of the intraband dynamics responsible for THz emission. For higher carrier densities, the dominant dephasing process at low temperature is carrier-carrier scattering. The presence of incoherent relaxed background carriers generated by a prepulse lead to a stronger dephasing than in the case where the same amount of coherent scatterers are created. A superlattice is used which consists of 9.7-nm GaAs wells separated by 1.7-nm Al0.3Ga0.7As barriers with a calculated width of the first electron miniband of 18 meV is used.

Original languageEnglish
Pages56-57
Number of pages2
StatePublished - 1998
EventProceedings of the 1998 International Quantum Electronics Conference - San Francisco, CA, USA
Duration: 3 May 19988 May 1998

Conference

ConferenceProceedings of the 1998 International Quantum Electronics Conference
CitySan Francisco, CA, USA
Period3/05/988/05/98

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