Abstract
We report the influence of EDTA and DTPA on the optical and laser damage thresholds of industrially relevant 4-dimethylamino-N-methyl stilbazolium tosylate (DAST) single crystals. Single crystal X-ray diffraction and powder X-ray diffraction studies substantiate that they crystallize in monoclinic system. The dopants facilitate tuning of the refractive indices and their optical conductivity. The laser damage threshold values of EDTA and DTPA-doped DAST crystals were found to be 1.5 and 1.6 times higher than the pure DAST crystal. The voltage-dependant photoconducting studies performed at ambient conditions shows negative photoconducting nature for pure and EDTA-doped DAST crystals while positive photoconducting nature is noticed for DTPA-doped crystal. The etching studies demonstrate the quality of the doped DAST crystals is better than the pure one.
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