The effect of electric field on the excitonic states in coupled quantum well structures

Yutaka Takahashi, Yoshimine Kato, Satoru S. Kano, Susumu Fukatsu, Yasuhiro Shiraki, Ryoichi Ito

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We have calculated by a variational procedure the excitonic states in symmetric coupled quantum well structures of GaAs/AlGaAs in the presence of an external electric field perpendicular to the interfacial plane using a nonseparable, nonspherical hydrogenic trial wavefunction. The exciton binding energies have been calculated as a function of external electric field for various well and barrier widths. The nonspherical trial wavefunction leads to a better estimate of the exciton binding energy, especially in high electric field, than that calculated with a spherical one. The calculations show that the binding energy is strongly dependent on the external electric fields: the variation (increase or decrease) is related to the spatial distribution of the wavefunctions. The results of the calculation are consistent with our experimental results.

Original languageEnglish
Pages (from-to)2299-2305
Number of pages7
JournalJournal of Applied Physics
Volume76
Issue number4
DOIs
Publication statusPublished - Dec 1 1994

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quantum wells
electric fields
binding energy
excitons
aluminum gallium arsenides
spatial distribution
estimates

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

The effect of electric field on the excitonic states in coupled quantum well structures. / Takahashi, Yutaka; Kato, Yoshimine; Kano, Satoru S.; Fukatsu, Susumu; Shiraki, Yasuhiro; Ito, Ryoichi.

In: Journal of Applied Physics, Vol. 76, No. 4, 01.12.1994, p. 2299-2305.

Research output: Contribution to journalArticle

Takahashi, Yutaka ; Kato, Yoshimine ; Kano, Satoru S. ; Fukatsu, Susumu ; Shiraki, Yasuhiro ; Ito, Ryoichi. / The effect of electric field on the excitonic states in coupled quantum well structures. In: Journal of Applied Physics. 1994 ; Vol. 76, No. 4. pp. 2299-2305.
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