Temperature and concentration quenching of mid-IR photoluminescence in iron doped ZnSe and ZnS laser crystals |
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| Authors: | NoSoung Myoung Vladimir V. Fedorov Sergey B. Mirov Lowell E. Wenger |
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| Affiliation: | Center for Optical Sensors and Spectroscopies and the Department of Physics, University of Alabama at Birmingham, CH 310, 1300 University Boulevard, Birmingham, AL 35294, USA |
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| Abstract: | Concentration dependences of the mid-IR kinetic of luminescence at 5E?5T2 transition in Fe:ZnSe and Fe:ZnS laser samples were studied in 14–300 K temperature ranges. Radiation lifetime in Fe:ZnSe samples measured using low doped samples with iron concentration 0.1×1018 cm?3 was estimated to be 57 μs. The magnetic susceptibility for higher doped (CFe=38 and 112×1018 cm?3) Fe:ZnSe samples was found to consist of a paramagnetic Curie–Weiss behavior arising from the weakly interacting Fe2+ ions and a diamagnetic ZnSe contribution plus a temperature-independent, field-dependent contribution possibly arising from very small amounts of aggregated Fe. |
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