Photomodulated reflectivity of Zn1 - xMnxTe/ZnTe multiple quantum wells

P. J. Klar, D. Wolverson, D. E. Ashenford, B. Lunn

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7 Citations (SciVal)


A Zn0.93Mn0.07Te/ZnTe multiple quantum well sample has been studied by modulation spectroscopy using conventional photoreflectivity with above-band-gap laser modulation (a-PR) as well as by a novel version of the technique which employs below-band-gap laser modulation (b-PR). For both techniques, temperature dependent measurements from 10 to 150 K were carried out and, for b-PR, modulation frequency dependent measurements over the range 40-13 kHz were also performed. Although the appearance of the b-PR spectra is different from the a-PR spectra, both techniques give the same spectroscopic information. There is evidence that b-PR is, like a-PR, a form of electroreflectance spectroscopy. However, while the a-PR modulation mechanism is mainly determined by photoexcitation across the band gap, the photoexcitation of deep levels seems to be the dominant mechanism for b-PR.

Original languageEnglish
Pages (from-to)528-532
Number of pages5
JournalJournal of Crystal Growth
Issue number1-4
Publication statusPublished - Feb 1996

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


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