Conservation of intraband coherence upon carrier relaxation by LO-phonon emission

F. Wolter, H. G. Roskos, K. C. Je, J. Hader, T. Meier, F. Rossi, K. Koehler, S. W. Koch, H. Kurz

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

A combined investigation of the coherent and incoherent dynamics of optically excited charge carriers in a superlattice structure is presented. The coherent dynamics was probed by THz-emission spectroscopy while the population dynamics of the electrons were measured at comparable densities with a two-color pump/probe transmission setup. For electrons in the e1 miniband, the phonon-emission time is determined by measurement of differential-transmission-change spectra (DTS) transients at different excitation photon energies below and above the energy threshold for LO-phonon emission. A comparison of the characteristic time constants provide evidence for the conservation of the phase of the intraband coherence on LO-phonon relaxation.

Original languageEnglish (US)
Pages35-36
Number of pages2
StatePublished - 1997
Externally publishedYes
EventProceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS - Baltimore, MD, USA
Duration: May 18 1997May 23 1997

Other

OtherProceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS
CityBaltimore, MD, USA
Period5/18/975/23/97

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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