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Excitons in confined systems: from quantum well to bulk behaviour

Physics Letters A, ISSN: 0375-9601, Vol: 168, Issue: 5, Page: 451-459
1992
  • 40
    Citations
  • 0
    Usage
  • 15
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    40
    • Citation Indexes
      40
  • Captures
    15

Article Description

A theoretical study of excitons in CuCl films is presented, which is valid for both L ∼ a B and L ⪢ a B, where L is the well width and a B is the exciton radius. Exciton binding energies and oscillator strengths are calculated, and the effect of the different dielectric constant of the barrier is studied in detail. The oscillator strength as a function of well width is shown to have a minimum at L ∼ 3 a B. The radiative lifetime of free excitons is calculated. For thin wells, thermalization produces a radiative lifetime which is linear in temperature. For wide wells, the lifetime becomes independent of well width and proportional to T32.

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