Funct. Mater. 2016; 23 (1): 027-031.
Microhardness, laser damage threshold and SHG efficiency studies of potassium dihydrogen phosphate crystals doped with L-arginine amino acid
1Institute for Single Crystals, STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Nauky Ave., 61001 Kharkiv, Ukraine
2Laboratoire des Sciences des Prosedes et des Materiaux, CNRS, 13 Universite Paris, Sorbone Paris Cite, France
Potassium dihydrogen phosphate (KDP) single crystals doped with L-arginine (L-arg) amino acid (with a concentration of 0.3 to 1.4 wt. % in the solution) were grown onto a point seed by the temperature reduction method. The effect of L-arg molecules on the strength properties {100} of KDP crystal were studied. Doping of KDP crystals with L-arg molecules raised the laser damage threshold in comparison with pure KDP in the sector {101}. There were defined the ranges of L-arg concentration where the microhardness and bulk laser damage threshold of KDP:L-arg crystals were higher in the growth sectors as compared with pure KDP. It was found that the efficiency of second harmonic generation in KDP:L-arg (1.4 wt.% of L-arg) exceeded the corresponding characteristic of pure KDP by ~ 2.5 times.
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