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Optical absorption and luminescence in KDP:XO dye inclusion crystals

The present work deals with the investigation of potassium dihydrogen phosphate (KDP) single crystals containing xylenol orange dye (XO) by means of optical and luminescence spectroscopy. Investigation shows that XO incorporates in KDP single crystal and occupies oriented sites. It leads to the appearance of the dichroic optical absorption and the polarized luminescence in the visible spectral region.