Indian Journal of Science and Technology
Year: 2010, Volume: 3, Issue: 6, Pages: 656-658
V. Natarajan, T. Sivanesan and S. Pandi *
1 Department of Physics, Rajalakshmi Institute of Technology, Kuthampakkam – 602 107, Chennai, India
2 Department of Physics Aksheyaa College of Engineering, Puludivakkam – 603 314, Kanchipuram Dt., India
3 Head Department of Physics, Presidency College, Chennai – 600 005,India
Potassium aluminum sulphate dodeca hydrate crystals were grown from aqueous solution and studied by X-ray diffraction. The UV – Visual IR transmission spectra indicate a better transparency between 200 and 800 nm. The nonlinear refractive index n2 and susceptibility χ (3) have been measured through the Z-scan technique. The results indicate that the compound exhibits saturation absorption and self -focusing performance. Non-linear absorption Co-efficient β is determined as 7.6746 x 10 – 4 cm/W. Non-linear refractive index n2 measured at the wavelength of 632.8 nm is calculated as 1.46412 x 10-8 cm2 /W. The real and imaginary pars of χ (3) have been measured at 632.8 nm and found to be 7.84088 x 10-07 esu and 2.07218 x 10-08 esu, respectively. The measured 3rd order non-linear properties confirm its suitability for nonlinear optical devices such as optical limiting and switching.
Keywords: Growth from solution, single XRD, UV spectrum, Z-scan.
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