Experimental study reveals oxygen vacancy concentration and charge state dictate absorption and photoluminescence in rutile, highlighting mechanisms for defect-based optical tuning.
Single-crystal (001) rutile plate was irradiated intensively with 40 keV argon ions. Then, electromigration of oxygen vacancies was done in the irradiated rutile. The effect the concentration and charge state of oxygen vacancies has on the color, optical absorption spectra, and photoluminescence of rutile is shown.
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Begishev et al. (2024) studied this question.
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