Abstract
To realize an electrically pumped compact mid-IR microlaser, the optical properties of a 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 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 and of structural defects in the ZnSe host matrix.
© 2010 Optical Society of America
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