Mixed Crystallization Effects on the Optical Properties of Multilayer Alkali Halide Films

Keiichi Edamatsu, Shoichi Hirota, Masamitsu Hirai

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The optical properties and X-ray diffraction of the MI-MBr and MI-MCI (M = K, Rb) multilayer (ML) films were investigated. The excitonic absorption spectra of the MI-MBr ML films with layers thinner than 10 nm (layers in a film were of equal thickness) showed a blue shift, while those of the MI-MCI ML films did not. The luminescence spectra and the X-ray diffraction profiles of the thin-layered KI-KBr ML films were very similar to those of the mixed crystal, indicating close similarity of crystallographic structure. Thus, the observed blue shift of the excitonic absorption for the thin-layered MI-MBr ML films seems to originate from the interlayer mixed crystallization grown by diffusion in the boundary region between layers, but not from the quantum-confinement effect.

Original languageEnglish
Pages (from-to)2543-2549
Number of pages7
Journaljournal of the physical society of japan
Volume61
Issue number7
DOIs
Publication statusPublished - 1992 Jan 1

Keywords

  • X-ray diffraction
  • alkali halide
  • exciton
  • luminescence
  • mixed crystal
  • multilayer film
  • optical absorption
  • quantum well
  • superlattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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