Growth and Characterization of Some Organic Nonlinear Optical Crystals

Abstract

ABSTRACT newlineThe materials having nonlinear optical (NLO) properties are fundamental in newlineprocesses of acquisition, modification, storing and transmission of information newlinethrough photons. Currently, there is a lot of interest on nonlinear optical (NLO) newlineproperties of materials, since they provide valuable information about important newlineaspects of matter. Crystal growth and characterization are of vital interest for many newlineareas. With a progress in crystal growth technology, materials having attractive newlinenonlinear properties have been reported. This has enabled the commercial newlinedevelopment of single crystals with promising the NLO properties including newlinepotential applications that lie in the fields of high density data storage, highresolution newlineprinting and spectroscopy. The single crystals form an indispensable part newlineof the rapidly advancing technology. The uniformity of single crystals can allow the newlinetransmission of electromagnetic waves, without scattering. The emergence of new newlinematerials with superior quality is often responsible for major advances in new newlinetechnologies. The high speed and high degree of parallelism of optics will lead newlinegradually to optoelectronic systems where an increasing number of functions will be newlineimplemented optically. The nonlinear optics has entered the day to day life of all in newlinemany ways and has also been the basis for numerous new developments in optical newlineinformation processing, telecommunications and integrated optics. The SHG is the newlinesimplest nonlinear optical process in which the atomic response to a high intensity newlinelaser depends quadratically on the strength of the applied optical field. newlineGenerally, the organic crystals are formed by various intermolecular forces, newlineweak and strong, such as Vander Waals interaction, dipole-dipole interaction, newlinehydrogen bonding etc. As a general tendency organic molecules possessing electron newlinedonating and accepting groups connected by extended -electron pathways have newlinelarge hyperpolarizabilities. In addition, amino acids have peculiar physical and newlinechemical properties. These properti