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 - 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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