Novel optical properties of Zn1-xMnxSe1-yTey epilayers grown by molecular beam epitaxy

C. S. Ro, Wu-Ching Chou*, C. S. Yang, T. Y. Lin, K. C. Chiu, J. L. Shen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Zn1-xMnxSe1-yTey (x ≤ 0.78, 0 ≤ y ≤ 1) epilayers were grown on the GaAs (001) substrate with substrate tilt angle 0°, 3°, 10°, and 15° towards [010] by molecular beam epitaxy. In case of ZnSe1-yTey epilayers, a blue shift of 5 meV was found as the substrate tilt angle increased from 0° to 15°. Whereas in the case of Zn1-xMnxSe epilayers, a red shift of 4 meV was found as the substrate tilt angle increased from 0° to 15°. The blue (red) shift in band gap energy is attributed to the increasing incorporation of smaller Se (Zn) ion with the increase in the kink density which results from the increase in the substrate tilt angle. In addition, a novel photoluminescence channel is proposed to explain the enhanced photoluminescence of the intra-Mn2+ ion transition, 6A1 to 4T1 transitions.

Original languageEnglish
Pages (from-to)232-237
Number of pages6
JournalMaterials Chemistry and Physics
Volume57
Issue number3
DOIs
StatePublished - 25 Jan 1999

Keywords

  • Kink density
  • Molecular beam epitaxy
  • Photoluminescence
  • Substrate tilt angle
  • ZnMnSeTe

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