Femtosecond recovery of exciton bleaching in the optical Stark effect

J. P. Sokoloff, S. G. Lee, R. Jin, P. A. Harten, Rudolf Binder, Stephan W Koch, H. M. Gibbs, Nasser N Peyghambarian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The observation of a very fast recovery of the exciton bleaching for an off-resonance excitation condition in a quantum-well sample at room temperature is reported. The experiments were performed on a GaAs/AlGaAs multiple quantum well (MQW) with 76-angstrom well sizes. A hybridly mode-locked dye laser that yielded 70-fs (FWHM) pulses at an 82-MHz repetition rate centered at ≅865 nm was used. The time delay was varied by changing the optical path of the pump pulse. The absorption spectra of the probe and the numerically evaluated excitonic absorption spectra, both at various time delays, are shown and discussed. The good agreement between the experimental results and the numerical calculations of the time-resolved absorption spectra suggests a coherent transient population buildup and decay occurring on the time scale of the pump pulse.

Original languageEnglish (US)
Title of host publicationXVII International Conference on Quantum Electronics. Digest of
PublisherPubl by IEEE
Pages92-93
Number of pages2
StatePublished - 1990
Event17th International Conference on Quantum Electronics - IQEC '90 - Anaheim, CA, USA
Duration: May 21 1990May 25 1990

Other

Other17th International Conference on Quantum Electronics - IQEC '90
CityAnaheim, CA, USA
Period5/21/905/25/90

Fingerprint

Stark effect
Bleaching
Excitons
Absorption spectra
Recovery
Semiconductor quantum wells
Time delay
Pumps
Dye lasers
Laser modes
Full width at half maximum
Laser pulses
Experiments
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Sokoloff, J. P., Lee, S. G., Jin, R., Harten, P. A., Binder, R., Koch, S. W., ... Peyghambarian, N. N. (1990). Femtosecond recovery of exciton bleaching in the optical Stark effect. In XVII International Conference on Quantum Electronics. Digest of (pp. 92-93). Publ by IEEE.

Femtosecond recovery of exciton bleaching in the optical Stark effect. / Sokoloff, J. P.; Lee, S. G.; Jin, R.; Harten, P. A.; Binder, Rudolf; Koch, Stephan W; Gibbs, H. M.; Peyghambarian, Nasser N.

XVII International Conference on Quantum Electronics. Digest of. Publ by IEEE, 1990. p. 92-93.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sokoloff, JP, Lee, SG, Jin, R, Harten, PA, Binder, R, Koch, SW, Gibbs, HM & Peyghambarian, NN 1990, Femtosecond recovery of exciton bleaching in the optical Stark effect. in XVII International Conference on Quantum Electronics. Digest of. Publ by IEEE, pp. 92-93, 17th International Conference on Quantum Electronics - IQEC '90, Anaheim, CA, USA, 5/21/90.
Sokoloff JP, Lee SG, Jin R, Harten PA, Binder R, Koch SW et al. Femtosecond recovery of exciton bleaching in the optical Stark effect. In XVII International Conference on Quantum Electronics. Digest of. Publ by IEEE. 1990. p. 92-93
Sokoloff, J. P. ; Lee, S. G. ; Jin, R. ; Harten, P. A. ; Binder, Rudolf ; Koch, Stephan W ; Gibbs, H. M. ; Peyghambarian, Nasser N. / Femtosecond recovery of exciton bleaching in the optical Stark effect. XVII International Conference on Quantum Electronics. Digest of. Publ by IEEE, 1990. pp. 92-93
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AU - Koch, Stephan W

AU - Gibbs, H. M.

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AB - The observation of a very fast recovery of the exciton bleaching for an off-resonance excitation condition in a quantum-well sample at room temperature is reported. The experiments were performed on a GaAs/AlGaAs multiple quantum well (MQW) with 76-angstrom well sizes. A hybridly mode-locked dye laser that yielded 70-fs (FWHM) pulses at an 82-MHz repetition rate centered at ≅865 nm was used. The time delay was varied by changing the optical path of the pump pulse. The absorption spectra of the probe and the numerically evaluated excitonic absorption spectra, both at various time delays, are shown and discussed. The good agreement between the experimental results and the numerical calculations of the time-resolved absorption spectra suggests a coherent transient population buildup and decay occurring on the time scale of the pump pulse.

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