Defect free bulk single crystals are needed for electronic industries because of their usage in the field of semiconductor, nonlinear optical, piezoelectric devices and so on. The research on organic crystals in application point of view was started during 1980’s. For practical applications, we need good optical transparency and also crystal should withstand high optical powers, and should have chemical stability. It is difficult to find a material that satisfies most of the above said requirements, however, amino acid crystals are good candidates for NLO applications. Especially, the complex of amino acid and strong inorganic acid plays a vital role in SHG applications. Several authors grew a number of organic-inorganic complex based crystals. Most of these complexes are exhibiting SHG.

There are different techniques to grow bulk crystals in which melt and solution growth techniques are mostly used. The main advantages of solution growth method are convenience, simplicity and the possible avoidance of complex growth apparatus. The use of high purity solvent and solute and low viscosity of solution can give controlled supersaturation in growth. In conventional solution growth technique, there are different methods (viz. slow evaporation, slow cooling and temperature gradient methods) employed to grow bulk single crystals, however, a newly discovered novel method called “Sankaranarayanan-Ramasamy (SR) method” [1-2] gives bulk uni-directional crystals with good quality from solution.

We have employed this technique to grow the technologically important Ammonium Dihydrogen Orthophosphate (ADP) and unidirectional <110> ammonium dihydrogen orthophosphate (ADP) single crystal was grown by Sankaranarayanan-Ramasamy (SR) method. <110 > orientational seed was mounted at the bottom of the glass crucible and the crystal of diameter 20 mm and length of 60 mm was successfully grown by this novel SR method [3]. Almost hundred percent solute-crystal conversion efficiency was achieved.

Also, 70mm length and 18mm dia. uni-directional bulk semi organic nonlinear optical single crystal of L-Lysine monohydrochloride dihydrate (L- LMHCl) has been grown by Sankaranarayanan-Ramasamy (SR) method for the first time in the literature [4]. The growth rate was 5mm/day. The optical transparency of the grown crystal was measured. The results will be presented in detail.

References

[1] K.Sankaranarayanan and P. Ramasamy, J. Crystal Growth 280 (2005) 467.

[2] K. Sankaranarayanan, J. Crystal Growth, 284 (2005) 203.

[3] K.Sethuraman, R.Ramesh babu, R.Gopalakrishnan and P.Ramasamy J. Crystal Growth 294 (2006) 349

[4] R.Ramesh Babu, K.Sethuraman, R.Gopalakrishnan and P.Ramasamy

J. Crystal Growth 297(2) (2006) 356-360

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/9671 must be provided.

1. Characterization of swift heavy ion induced modification on the nonlinear optical Benzimidazole (BMZ) single crystals
2. Growth and characterization of NLO-N-Bromosuccinimide (NBS) single crystals
3. Growth and characterization of electro-optic Glycine lithium sulfate single crystals
4. Swift heavy ion induced modification on the Optical, Mechanical and Dielectric behaviour of GLS single crystals
5. Growth And Characterization of Nonlinear Optical L-Asparaginium Picrate Single Crystals.