Optical properties of Cr2+:ZnSe single crystal and film

To realize an electrically pumped compact mid-IR microlaser, the optical properties of a Cr(2+):ZnSe film deposited by rf magnetron cosputtering were compared with those of a single crystal. The mid-IR room temperature photoluminescence efficiency of the film appears only twice less than the one of...

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Bibliographic Details
Published inOptics letters Vol. 35; no. 7; p. 983
Main Authors Vivet, N, Morales, M, Levalois, M, Doualan, J L
Format Journal Article
LanguageEnglish
Published United States 01.04.2010
Subjects
Chromium - chemistry
Crystallization - methods
Light
Materials Testing
Membranes, Artificial
Refractometry
Scattering, Radiation
Selenium Compounds - chemistry
Zinc Compounds - chemistry
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Summary:To realize an electrically pumped compact mid-IR microlaser, the optical properties of a Cr(2+):ZnSe film deposited by rf magnetron cosputtering were compared with those of a single crystal. The mid-IR room temperature photoluminescence efficiency of the film appears only twice less than the one of the single crystal under direct (1850 nm) and indirect (458 nm) excitations. The smaller Cr(2+) fluorescence lifetime values of the film were attributed to the presence in the film of a large amount of chromium in a valence state different from Cr(2+) and of structural defects in the ZnSe host matrix.
ISSN:1539-4794
DOI:10.1364/OL.35.000983