Optical and EPR spectroscopy of Zn:Cr:ZnSe and Zn:Fe:ZnSe crystals
| Autor: | Tetyana Konak, Vladimir V. Fedorov, Sergey B. Mirov, Mary Ellen Zvanut, J. Dashdorj |
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| Rok vydání: | 2014 |
| Předmět: |
Photoluminescence
Materials science Organic Chemistry Analytical chemistry Quantum yield chemistry.chemical_element Atmospheric temperature range Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Ion Inorganic Chemistry Chromium chemistry law Ionization Excited state Electrical and Electronic Engineering Physical and Theoretical Chemistry Electron paramagnetic resonance Spectroscopy |
| Zdroj: | Optical Materials. 37:262-266 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2014.06.004 |
| Popis: | Optical and EPR characterization of Cr and Fe doped ZnSe crystals annealed in Zn vapor revealed a strong bleaching of the divalent state of transition metal ions. Photo induced EPR kinetics were studied in 20–80 K temperature range. Analysis of time-dependent data reveals Cr1+ signal rise time decreases with increasing temperature. The non-exponential decay of Cr1+ concentration were analyzed using Auger-type recombination process. The photoluminescence quantum yield of Cr2+ ions at 5E(D) → 5T2(D) mid-IR transition excited via chromium ionization process was measured to be close to 100%. |
| Databáze: | OpenAIRE |
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