Effect of Well Size Fluctuation on Photoluminescence Spectrum of AlAs–GaAs Superlattices

J-STAGE
  • Goldstein Leon
    Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation
  • Tarucha Seigo
    Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation
  • Horikoshi Yoshiji
    Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation
  • Okamoto Hiroshi
    Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation

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公開日
1983
公開者
公益社団法人 応用物理学会

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説明

Photoluminescence spectra for undoped superlattices exhibited smaller half widths compared with those obtained in GaAs bulk crystals. However, both the spectral width and shape were found to be very sensitive to the well size. When the well size is greater than about 80 Å, the spectrum at 77 K showed smaller linewidth, which agrees with theoretical results, whereas when the well size is smaller than this, the spectral width increased with decreasing well size. In some cases, additional emission bands appeared in the lower energy side of the main emission peak. These phenomena were interpreted in terms of well size fluctuations.

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