Exciton lifetime in quantum well with vicinal high-density excitons

M. Hirasawa, T. Ishihara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Radiative lifetime of an exciton in a GaAs quantum well (QW) is controlled by high-density excitons, which restrict the exciton coherence through scattering. In order to circumvent the phase space filling effect of high-density excitons, we have prepared a QW structure in such a way that a reservoir for high-density excitons is separated from the QW. The lifetime increases (up to 30%) with the exciton density in the reservoir and saturates at 1×1017/cm3. The upper bound lifetime is determined by the excitonic relative motion.

Original languageEnglish
Pages (from-to)600-603
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number3
Publication statusPublished - 2000 May
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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