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Articles

Crystal Growth, Spectral, Optical and Thermal Studies of Thiourea Ammonium Acetate Doped Potassium Dihydrogen Phosphate Crystal for NLO Applications

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Pages 37-49 | Received 12 Mar 2018, Accepted 02 Jul 2018, Published online: 13 May 2019
 

Abstract

The non-linear optical single crystal of thiourea ammonium acetate doped potassium dihydrogen phosphate was grown by slow evaporation solution technique of size 19 × 11 × 4 mm3. The crystallographic unit cell parameters of grown crystal were determined by single crystal X-ray diffraction study. The optical study revealed that the doped KDP crystal has high transmittance, low cut off wavelength and high optical band gap. The enhanced second harmonic generation efficiency of doped KDP crystal was determined by employing Kurtz-Perry powder technique. The third order non-linear absorption coefficient (β), non-linear refractive index (n2) and susceptibility [χ(3)] were calculated using Z-scan technique. The laser damage threshold of grown crystal has been determined. The thermal properties of the grown crystal were carried out by thermogravimetric and differential thermal analysis.

Acknowledgments

The authors are also thankful to Dr. Babu Varghese (IIT Madras) for single crystal XRD analysis and also thankful to Dr. S. Kalainathan (VIT University, India) for extending laser damage threshold facility.

Funding

Author M. D. Shirsat is thankful for the funding received under UGC-SAP Programme (F.530/16/DRS-I/2016 (SAP-II) Dt. 16-04-2016).

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