Investigation on Pure and L-lysine Doped Glycine Barium Chloride Single Crystal

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Mechanics, Materials Science & Engineering, March 2017

ISSN 2412-5954

Investigation on Pure and L-lysine Doped (Tri) Glycine Barium Chloride (TGBC) Single Crystal for Nonlinear Optical Applications 2 S. Chennakrishnan1, S.M. Ravikumar2, D. Sivavishnu2, M. Packiya Raj3, S.Varalakshmi4 1

Dept. of physics, Idhaya Arts & science College for women, Tiruvannamalai-606 603, Tamil Nadu, India

2

Department of physics, Government Arts College, Tiruvannamalai-606 603, Tamil Nadu, India

3

Department of Physics, S.K.P. Engineering College, Tiruvannamalai 606 611, Tamil Nadu, India

4

Department of physics, Kamban College of Arts & Science for Women, Tiruvannamalai 606 601. Tamil Nadu, India DOI 10.2412/mmse.05.501.447 provided by Seo4U.link

Keywords: solution growth, X-ray diffraction, nonlinear optical material, thermal study.

ABSTRACT. Single crystals of pure and L-lysine doped (tri) glycine barium chloride (TGBC) were grown by slow solvent evaporation technique with the vision to improve the physicochemical properties of the sample. Single crystal Xray diffraction analysis of both pure and doped samples was carried out and the results are compared. Optical absorption and FTIR spectroscopic studies are performed to identify the UV cut-off wavelength range and the presence of various functional groups in the grown crystals. The thermos-gravimetric (TG) analysis of L-lysine doped TGBC indicates a marginal increase in the thermal stability of the crystals. The SHG efficiency of pure and doped TGBC was discussed.

1. Introduction. A novel nonlinear optical (NLO) crystal is attracting many theoretical and experimental researchers recently because NLO crystals are used in various applications in the areas like high speed information processing, optical communication, optoelectronics and optical data storage [1-3]. Materials with large second order harmonic optical nonlinearities, transparency at required wavelength and stable physicochemical performance are needed to realize the many of these applications. Currently there is a need for materials with large non linearity, which efficiently double the low peak power sources such as diode laser [4]. Among the different varieties of NLO crystals, semi-organic crystals are gaining rapid interest due to their interesting and intriguing properties. Optical non-linearity of inorganic crystals is generally lower than that of optical device demand organic compounds are often formed by weak Vander walls, hydrogen bond and process a high degree of delocalization [5-8]. A major drawback of organic NLO crystals is the difficulty in growing large size good optical quality and high mechanical stability single crystal [9]. In fact, considerable effort has been made on semi-organic crystals due to their having the combined properties of both inorganic and organic crystals also high damage threshold, wide transparency range, high mechanical strength and chemical stability. Hence, the semi-organic crystals are suitable for the device fabrication [1012]. Amino acid based semi-organic compounds have been recently recognized as potential candidates for second harmonic generation (SHG) [13 15]. Amino acids are interesting materials for NLO applications as they contain proton acceptor carboxyl acid (-COOH) group and the proton donor amino (NH2) group. Glycine (NH2-CH2-COOH) is the simplest amino acid. Unlike other amino acids, it has as symmetric carbon atom and is optically inactive. Also, glycine can be readily combined with variety of acids, organic and inorganic components to produce a host of materials with interesting properties [16-17]. Glycine mixed with metal chlorides such as zinc chloride [18], calcium chloride [19], potassium chloride [20], sodium chloride [21] and lithium chloride [22] has been reported in the 22

-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/

MMSE Journal. Open Access www.mmse.xyz

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