Kalainathan S

Department of Physics

School of Advanced Sciences

Vellore Campus

Prasad A

Meenakshisundaram S.P.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Optik

Optics & Laser Technology

Novel report on SHG efficiency, Z-scan, laser damage threshold, photoluminescence, dielectric and surface microscopic studies of hybrid inorganic ammonium zinc sulphate hydrate single crystal

The Journal of Physical Chemistry C

A New Nonlinear Optical Stilbazolium Family Crystal of (E)-1-Ethyl-2-(4-nitrostyryl) Pyridin-1-ium Iodide: Synthesis, Crystal Structure, and Its Third-Order Nonlinear Optical Properties

Estimation of thermodynamic and third-order nonlinear optical properties of a series of organic liquids based on ethylenediaminium divalent cation, [C2H10N2]X2 (where X = 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol and 2,4,6-trinitrophenol respectively) was made. Increase in nitro groups of ethylenediaminium nitrophenolates has predominantly increased the point of decomposition (145–243 °C). Various thermodynamic properties as a function of temperature were estimated theoretically from the DSC curves. Thermal conductivity and specific heat capacity was increasing while thermal diffusivity was decreasing with rise in temperature. Ethylenediaminium trinitrophenolate (EDA246TNP) showed maximum thermal conductivity (30.3 W m− 1 K− 1) and specific heat capacity (2684 J kg− 1 K− 1), while thermal diffusivity (9.6 × 10− 6 m2 S− 1) was higher for ethylenediaminium 2-nitrophenolate (EDA2NP). Z-scan experiment showed that all samples exhibit saturable absorption and self-defocusing behaviour under CW laser (532 nm, 50 mW) excitation. The observed nonlinearity was found to be thermal in origin with order of nonlinearity as ED246TNP &gt; EDA24DNP &gt; EDA4NP &gt; EDA2NP. EDA246TNP possess maximum nonlinear absorption coefficient (8.37 × 10− 3 cm/W), nonlinear refractive index (8.41 × 10− 8 cm2/W), third-order nonlinear optical susceptibility (5.21 × 10− 6 esu), second-order hyperpolarizability (9.81 × 10− 25 esu) and thermo-optic coefficient (− 0.21 × 10− 6 K− 1) than other phenol-ammonium salts. All samples exhibit optical limiting action with optical limiting onset values of 35–38 mW having limiting amplitude of 6.7–9.3 mW. The influence of number and position of nitro groups in tuning the thermodynamic and nonlinearity of ethylenediaminium nitrophenolate was discussed in detail. © 2017 Elsevier B.V.

Journal of Molecular Liquids

Influence of number and position of nitro groups in tuning the thermodynamic and nonlinear optical properties of ethylenediaminium nitrophenolates

Heart Research - Open Journal

3D Printed Models of Complex Anatomy in Cardiovascular Disease

Crystal Research and Technology

Crystal growth, characterization and Density functional theory computations of supramolecular N-carbamothioyl acetamide

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Hyperpolarizability calculation and kinetic effect of impurities on LVP

Synthesis, crystal growth, characterization and theoretical studies of 4-aminobenzophenonium picrate

Crystal growth, characterization and theoretical studies of 4-aminopyridinium picrate

Supramolecular architecture of third-order nonlinear optical ammonium picrate: Crystal growth and DFT approach

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Publisher	Data powered by TypesetElsevier BV
ISSN	0030-4026
Open Access	0