Coherent dynamics of exciton wavepackets in semiconductor heterostructures

J. Feldmann, M. Koch, E. O. Goebel, F. Jahnke, T. Meier, W. Schaefer, P. Thomas, Stephan W Koch, H. Nickel, S. Luttgen, W. Stolz

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The coherent dynamics of exciton wavepackets in (GaIn)As/GaAs as well as (GaIn) As/(Ga(PAs) multiple quantum well structures is studied by means of transient four-wave mixing (FWM) experiments. The wavepackets are generated by simultaneous excitation of several exciton transitions with laser pulses of about 100 fs duration. The time-integrated FWM signals exhibit a pronounced modulation superimposed on the overall decay which can be attributed to the quantum interference of the different eigenstates. In the time-resolved FWM signals this interference is not present, reflecting the interplay between many-body Coulomb effects and inhomogeneous broadening. This experimental technique is then employed to extract the exciton binding energies in pseudomorphic symmetrically strained (GaIn) As/Ga(PAs) with various In contents.

Original languageEnglish (US)
Pages (from-to)1965-1971
Number of pages7
JournalSemiconductor Science and Technology
Volume9
Issue number11 S
StatePublished - Nov 1994
Externally publishedYes

Fingerprint

Four wave mixing
Excitons
four-wave mixing
Heterojunctions
excitons
Semiconductor materials
interference
Signal interference
Electron transitions
Binding energy
Semiconductor quantum wells
Laser pulses
eigenvectors
binding energy
Modulation
quantum wells
modulation
decay
pulses
excitation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Feldmann, J., Koch, M., Goebel, E. O., Jahnke, F., Meier, T., Schaefer, W., ... Stolz, W. (1994). Coherent dynamics of exciton wavepackets in semiconductor heterostructures. Semiconductor Science and Technology, 9(11 S), 1965-1971.

Coherent dynamics of exciton wavepackets in semiconductor heterostructures. / Feldmann, J.; Koch, M.; Goebel, E. O.; Jahnke, F.; Meier, T.; Schaefer, W.; Thomas, P.; Koch, Stephan W; Nickel, H.; Luttgen, S.; Stolz, W.

In: Semiconductor Science and Technology, Vol. 9, No. 11 S, 11.1994, p. 1965-1971.

Research output: Contribution to journalArticle

Feldmann, J, Koch, M, Goebel, EO, Jahnke, F, Meier, T, Schaefer, W, Thomas, P, Koch, SW, Nickel, H, Luttgen, S & Stolz, W 1994, 'Coherent dynamics of exciton wavepackets in semiconductor heterostructures', Semiconductor Science and Technology, vol. 9, no. 11 S, pp. 1965-1971.
Feldmann J, Koch M, Goebel EO, Jahnke F, Meier T, Schaefer W et al. Coherent dynamics of exciton wavepackets in semiconductor heterostructures. Semiconductor Science and Technology. 1994 Nov;9(11 S):1965-1971.
Feldmann, J. ; Koch, M. ; Goebel, E. O. ; Jahnke, F. ; Meier, T. ; Schaefer, W. ; Thomas, P. ; Koch, Stephan W ; Nickel, H. ; Luttgen, S. ; Stolz, W. / Coherent dynamics of exciton wavepackets in semiconductor heterostructures. In: Semiconductor Science and Technology. 1994 ; Vol. 9, No. 11 S. pp. 1965-1971.
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