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Growth of an Organic Single Crystal Benzophenone and Investigating Its Third Order NLO Properties by Z Scan Technique
V. Natarajan, B. Thirumalaiselvam and P. Jagadeeshwaran
Benzophenone single crystals were grown by the slow evaporation method using ethanol as a solvent. The grown crystals are of the size 5x5x1 mm3. The linear and non-linear optical properties of the grown crystals are investigated. We need a good optical quality of the crystal is required for the Z-Scan technique. The Benzophenone crystals are having greater figure of merits when compared to the other crystals. The unit cell parameters of the grown crystals were studied using single-crystal XRD technique. The optical absorption of the grown crystals in the UV– Visual region shows the optical transparency of the grown crystals in the region 300 nm to 1000 nm. The second-order nonlinear refractive index n2 and the third order susceptibility χ(3) of the grown crystals using Z-scan method. From the Z-Scan observations it is evident that the single crystal of Benzophenone shows the saturation absorption and self-focusing effect. The higher-order nonlinear absorption coefficient β is -2.0247 x 10+4 cm2/W. The calculated non-linear refractive index n2 for the wavelength 632.8 nm is -3.5222 x 10-8 cm2/W. The third-order nonlinear susceptibility of the grown crystal is its real part is -2.3796 x 10-06 esu and its imaginary parts is around -6.89182 x 10-05 esu,
Keywords: Growth from solution, single XRD, U-V Spectrum, NLO property, Third-order Z-Scan