Critical thickness of quantum well for observing Franz-Keldysh oscillation

R. B. Chen, Yan Ten Lu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Using scaling Fourier transformation (FT), we study the electro-reflectance spectra of quantum wells (QW) with well thickness from 200 to 1500 angstroms under a built-in electric field 50 kV/cm. For wider QWs, the FT of the spectra with energy scaled in (ℏω-Eg)3/2 exhibits Franz-Keldysh oscillation characteristic peaks. On the contrary, for the narrower QWs the characteristic peak of quantum confinement can be observed in FT with energy scaled in √ℏω-Eg. By comparing the Fourier spectra, we set the transition width at 600 angstroms, which is much larger and more realistic than those reported previously.

Original languageEnglish
Pages (from-to)117-120
Number of pages4
JournalSolid State Communications
Issue number3
Publication statusPublished - 2000 Mar 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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