Vijayan, N. and Bhagavannarayana, G. and Halder, S. K. and Verma, S. and Philip, J. and Philip, R. and Rathi, Brijesh (2013) X-ray topography, photopyroelectric and two-photon absorption studies on solution grown benzimidazole single crystal. Applied Physics A: Materials Science and Processing , 110. pp. 55-58. ISSN 0947-8396

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Benzimidazole (BMZ) is an organic nonlinear optical material, and it is possible to grow it in the laboratory by a slow evaporation solution growth technique using methanol as the solvent. Its nonlinear optical harmonic generation efficiency is 4.5 times higher than that of standard potassium dihydrogen phosphate (KDP) single crystal. It crystallizes with orthorhombic structure, which is noncentrosymmetric in nature, with lattice parameters a=13.58 , b=6.85 , c=6.97 . The functional groups of the grown specimen are confirmed by heteronuclear chemical shift correlation (HETCOR) analysis and it is found that other elements are not incorporated in the compound. The crystalline perfection is examined by high resolution X-ray diffraction (HRXRD), and its topographic image was recorded for the as-grown single crystal indicates the presence of some grain boundaries in the grown specimen. Thermal parameters such as thermal diffusivity (alpha), thermal conductivity (k), thermal effusivity (e), and heat capacity (c (p) ) have been determined by a photopyroelectric thermal wave method. In addition, piezoelectricity, birefringence, and third-order nonlinear optical properties have been examined. The two-photon absorption coefficient of the title compound is determined by the open-aperture Z-scan technique.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Materials Science
Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 28 May 2020 11:02
Last Modified: 28 May 2020 11:02

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