
Proceedings Paper
Spectroscopic characterization of Cr2+ ions in ZnSe/ZnS crystals under visible excitationFormat | Member Price | Non-Member Price |
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Paper Abstract
Detailed spectroscopic characterization of Cr:ZnSe (Cr:ZnS) crystals under visible excitation into the charge transfer
bands of Cr2+ impurities was performed. Middle infrared photoluminescence of Cr:ZnS under this excitation exhibits
shorter rise time (~150ns) than that previously observed in Cr:ZnSe (~4-10 μs). As a result the quantum yield of Cr:ZnS
mid-IR photoluminescence under 10ns pulsed 416nm excitation into the charge transfer band was estimated at close to
100%, which contrasts with low (~14%) quantum yield measured in Cr:ZnSe under 532nm pulsed excitation, indicating
the possibility of efficient excitation of the upper laser level of Cr:ZnS using this mechanism. The rise time can be
caused by cascade relaxation from higher lying levels through the 3T1 metastable level, producing luminescence in the
near-IR. Measurements of the temperature dependence of the middle- and near infrared photoluminescence signals are
reported. These values indicated that more efficient pumping of Cr:ZnSe under 532nm excitation can be achieved at
temperatures greater than 300 K. Results of high temperature laser experiments supporting this idea are presented.
Paper Details
Date Published: 26 March 2015
PDF: 6 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 934225 (26 March 2015); doi: 10.1117/12.2180289
Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)
PDF: 6 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 934225 (26 March 2015); doi: 10.1117/12.2180289
Show Author Affiliations
Jeremy M. Peppers, The Univ. of Alabama at Birmingham (United States)
Vladimir V. Fedorov, The Univ. of Alabama at Birmingham (United States)
Vladimir V. Fedorov, The Univ. of Alabama at Birmingham (United States)
Sergey B. Mirov, The Univ. of Alabama at Birmingham (United States)
Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)
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