Optically induced coherent intraband dynamics in disordered semiconductors

C. Schlichenmaier, I. Varga, T. Meier, P. Thomas, Stephan W Koch

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

On the basis of a tight-binding model for a strongly disordered semiconductor with correlated conduction- and valence-band disorder a coherent dynamical intraband effect is analyzed. For systems that are excited by two specially designed ultrashort light-pulse sequences delayed by τ relatively to each other echolike phenomena are predicted to occur. In addition to the interband photon echo which shows up at exactly t = 2 τ relative to the first pulse, the system responds with two spontaneous intraband current pulses preceding and following the appearance of the photon echo. The temporal splitting depends on the electron-hole mass ratio. Calculating the population relaxation rate due to Coulomb scattering, it is concluded that the predicted new dynamical effect should be experimentally observable in an interacting and strongly disordered system, such as the Quantum Coulomb Glass.

Original languageEnglish (US)
Article number085306
Pages (from-to)853061-853068
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number8
StatePublished - Feb 15 2002
Externally publishedYes

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Photons
Semiconductor materials
echoes
Valence bands
pulses
Conduction bands
photons
Scattering
Glass
mass ratios
Electrons
disorders
valence
conduction
glass
scattering

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Optically induced coherent intraband dynamics in disordered semiconductors. / Schlichenmaier, C.; Varga, I.; Meier, T.; Thomas, P.; Koch, Stephan W.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 8, 085306, 15.02.2002, p. 853061-853068.

Research output: Contribution to journalArticle

Schlichenmaier, C, Varga, I, Meier, T, Thomas, P & Koch, SW 2002, 'Optically induced coherent intraband dynamics in disordered semiconductors', Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 8, 085306, pp. 853061-853068.
Schlichenmaier, C. ; Varga, I. ; Meier, T. ; Thomas, P. ; Koch, Stephan W. / Optically induced coherent intraband dynamics in disordered semiconductors. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 8. pp. 853061-853068.
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