Enhancement of SHG efficiency by urea doping in ZTS single crystals and its correlation with crystalline perfection as revealed by Kurtz powder and high-resolution X-ray diffraction methods
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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Title |
Enhancement of SHG efficiency by urea doping in ZTS single crystals and its correlation with crystalline perfection as revealed by Kurtz powder and high-resolution X-ray diffraction methods
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Creator |
G. , Bhagavannarayana
Kushwaha, S. K. |
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Subject |
Crystallography
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Description |
The enhancement of second-harmonic generation (SHG) efficiency by urea doping in tristhioureazinc(II) sulfate (ZTS) single crystals and its correlation with crystalline perfection have been investigated. ZTS is a potential
semiorganic nonlinear optical material. Pure and urea-doped single crystals of ZTS have been successfully grown by the slow evaporation solution technique. The presence of dopant has been confirmed and analysed by Fourier transform
infrared spectrometry. The influence of urea doping at different concentrations on crystalline perfection has been thoroughly assessed by high-resolution X-ray diffractometry (HRXRD). HRXRD studies revealed that the ZTS crystals
could accommodate urea up to a critical concentration without any deterioration in crystalline perfection. Above this concentration, very low angle structural grain boundaries developed and it seems the excess urea above the
critical concentration was segregated along the grain boundaries. At very high doping concentrations, the crystals were found to contain mosaic blocks. The SHG efficiency has been studied using the Kurtz powder technique. The relative SHG efficiency of the crystals was found to increase substantially with the increase in urea concentration. The correlation found between crystalline
perfection and SHG efficiency is discussed.
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Publisher |
International Union of Crystallography
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Date |
2009-11-24
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://npl.csircentral.net/135/1/109.pdf
G. , Bhagavannarayana and Kushwaha, S. K. (2009) Enhancement of SHG efficiency by urea doping in ZTS single crystals and its correlation with crystalline perfection as revealed by Kurtz powder and high-resolution X-ray diffraction methods. Journal of Applied Crystallography, 43. 154-162 . ISSN 0021-8898 |
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Relation |
http://npl.csircentral.net/135/
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