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01272 am a22001573u 4500 |
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192617 |
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|a Hughes, Mark A.
|e author
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|a Curry, Richard J.
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|a Hewak, Daniel W.
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|a Determination of the oxidation state and coordination of a vanadium doped chalcogenide glass
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|c 2011-01.
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|z Get fulltext
|u https://eprints.soton.ac.uk/192617/1/4885.pdf
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|a Vanadium doped chalcogenide glass has potential as an active gain medium, particularly at telecommunications wavelengths. This dopant has three spin allowed absorption transitions at 1100, 737 and 578 nm, and a spin forbidden absorption transition at 1000 nm. X-ray photo electron spectroscopy indicated the presence of vanadium in a range of oxidation states from V<sup>+</sup> to V<sup>5+</sup>. Excitation of each absorption band resulted in the same characteristic emission spectrum and lifetime, indicating that only one oxidation state is optically active. Arguments based on Tanabe-Sugano analysis indicated that the configuration of the optically active vanadium ion was octahedral V<sup>2+</sup>. The calculated crystal field parameters (Dq/B, B and C/B) were 1.85, 485.1 and 4.55, respectively.
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|a cc_by_nc_nd_4
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|a Article
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