Nonlinear optical properties of type-II quantum wells

G. R. Olbright, W. S. Fu, J. F. Klem, H. M. Gibbs, Galina Khitrova, R. Pon, B. Fluegel, K. Meissner, Nasser N Peyghambarian, Rudolf Binder, I. Galbraith, Stephan W Koch

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Experimental and theoretical investigations of the near-band-gap optical nonlinearities in type-II GaAs/AlAs quantum wells are reported. The temporal evolution of the optical nonlinearities of different samples grown at our two different laboratories is analyzed by comparing femtosecond results at different pump-probe time delays with nanosecond measurements at different sample temperatures. The quasi-cw measurements at low temperatures show exciton bleaching and a pronounced heavy-hole exciton blueshift, which is absent at elevated plasma temperatures (100 K). Femtosecond spectra show a delayed onset of the exciton blueshift consistent with hole-plasma cooling in the absence of electrons. The results are analyzed using many-body theory assuming complete electron-hole charge separation. We show that the presence of a one-component plasma modifies the nonlinear optical behavior of the GaAs layer and results in dramatically different properties compared to type-I quantum-well structures.

Original languageEnglish (US)
Pages (from-to)3043-3053
Number of pages11
JournalPhysical Review B
Volume44
Issue number7
DOIs
StatePublished - 1991

Fingerprint

Excitons
Semiconductor quantum wells
Optical properties
excitons
quantum wells
Plasmas
optical properties
plasma cooling
nonlinearity
Electrons
Optical band gaps
plasma temperature
bleaching
polarization (charge separation)
Bleaching
Temperature
Time delay
time lag
Pumps
pumps

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Nonlinear optical properties of type-II quantum wells. / Olbright, G. R.; Fu, W. S.; Klem, J. F.; Gibbs, H. M.; Khitrova, Galina; Pon, R.; Fluegel, B.; Meissner, K.; Peyghambarian, Nasser N; Binder, Rudolf; Galbraith, I.; Koch, Stephan W.

In: Physical Review B, Vol. 44, No. 7, 1991, p. 3043-3053.

Research output: Contribution to journalArticle

Olbright, GR, Fu, WS, Klem, JF, Gibbs, HM, Khitrova, G, Pon, R, Fluegel, B, Meissner, K, Peyghambarian, NN, Binder, R, Galbraith, I & Koch, SW 1991, 'Nonlinear optical properties of type-II quantum wells', Physical Review B, vol. 44, no. 7, pp. 3043-3053. https://doi.org/10.1103/PhysRevB.44.3043
Olbright, G. R. ; Fu, W. S. ; Klem, J. F. ; Gibbs, H. M. ; Khitrova, Galina ; Pon, R. ; Fluegel, B. ; Meissner, K. ; Peyghambarian, Nasser N ; Binder, Rudolf ; Galbraith, I. ; Koch, Stephan W. / Nonlinear optical properties of type-II quantum wells. In: Physical Review B. 1991 ; Vol. 44, No. 7. pp. 3043-3053.
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