Ukrainian Journal of Physical Optics

Number 4, Volume 5, 2004

Photothermal Conversion of F-centres in Additively Coloured Potassium Chloride Crystals with Cationic and Anionic Impurities
Vladimirov D.A., Mandel V.E., Popov A.Yu., Tyurin A.V.

Scientific Research Institute of Physics, National I.I. Mechnikov University of Odessa, 27 Pasteur St., 65026 Odessa, Ukraine

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The compensating influence of cationic (Ca++ ions) and anionic (OH– ions) impurities doped into additively coloured potassium chloride crystal on the process of photothermal conversion of F-centres is detected. “Brightening” in the absorption band of the F-centres is revealed that achieves 90%. It is not accompanied by the appearance of centres absorbing in the visible range. Double vacancies and the complexes Ca++(OH–)2-cationic vacancy are shown to be responsible for this phenomenon. Basing on those results, a new system for holographic recording is suggested that uses the compensating effect of cationic and anionic impurities .

Key words: volume holograms, KCl crystals, cationic impurities, anionic impurities

doi 10.3116/16091833/5/4/131/2004

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