Optical and mechanical properties of a new second order nonlinear optical crystal urea l‐threonine

Abstract

A new second order non-linear optical organic crystal Urea L-threonine has been grown by aqueous solution slow cooling technique. The grown crystal is non hygroscopic and transparent in the visible region. The solubility of the grown crystal was found. The crystal structure and perfection were determined using powder XRD and High resolution XRD. The molecular structure was confirmed by 1 H-NMR spectrum. Thermal properties of the crystal have been studied using thermogravimetric (TG) and differential thermal analysis (DTA). The dielectric response of the crystal with varying frequencies at different temperatures was studied. UV-Visible spectrum was recorded to study the optical transparency of the grown crystals. The second order non linear optical property was examined by Kurtz powder technique and found that the second order susceptibilities is 1.2 KDP at wavelength 1064 nm. The mechanical behaviour was studied by Vickers Microhardness test. The results are discussed in detail.

Synthesis, growth, thermal, optical and mechanical properties of new organic NLO crystal: l-alanine dl-malic acid

“…L-alanine is the simplest amino acid having SHG efficiency one-third of that of the well-known KDP. A series of mixed derivatives, urea L-threonine [13], L-alanine acetate [14], L-alanine tetrafluoroborate [15] and L-alanine cadmium chloride [16] have been reported with increased NLO properties. In general, amino acid single crystals possess wide transparency in UV-visible region [17,18] and are considerably used in second harmonic non-linear optical (NLO)-application-based devices.…”

Influence of L-threonine on the growth, structural, optical, mechanical and nonlinear optical properties of tartaric acid single crystal

“…The zwitterionic character paved way for achieving superior properties such as high electro-optic parameters and improved mechanical and thermal strengths [13]. Among these compounds, L-threonine is an important amino acid which has SHG efficiency higher than that of many amino acids and their crystal family [14]. L-threonine (LT) with the molecular formula C 4 H 9 NO 3 is an uncharged polar amino acid that crystallizes in the noncentrosymmetric space group P2 1 2 1 2 1 .…”