Investigations on the optical, electric, dielectric and mechanical properties of nonlinear optical LAM crystal

By M. Vimalan, A. Cyrac Peter, T. Rajesh Kumar, C. Jayasekaran, J. Packiam Julius and P. Sagayaraj


Single Crystal of L-alaninium maleate (LAM), an organic nonlinear (NLO) material has been successfully grown upto a size of 14 x 5 x 4 mm3. The lattice parameters of the grown crystals are determined by single crystal XRD. The UV-Vis-NIR spectrum of LAM shows less optical absorption in the entire visible region. Nonlinear optical study reveals that the SHG efficiency of LAM is equal that of KDP. The laser damage density is found to be 8.43 GW/cm2. The mocrohardness study of the crystal confirms anisotropy in the work hardening co-efficient for different orientations. The dielectric response of the sample has been investigated in the frequency region of 50 Hz to 5 MHz. AC and DC conductivity and photoconductivity experiments are also carried out and reported for the first time.


Key Words : Solution growth, Nonlinear optics, Dielectric constant, ac and dc conductivity

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