Effect of Solvent on Third-Order Nonlinear Optical Behavior of Reactive Blue 19 Dye

S Jeyaram; J Naseer; S Punitha

doi:10.1007/s10895-021-02808-y

Effect of Solvent on Third-Order Nonlinear Optical Behavior of Reactive Blue 19 Dye

J Fluoresc. 2021 Nov;31(6):1895-1906. doi: 10.1007/s10895-021-02808-y. Epub 2021 Sep 17.

Authors

S Jeyaram¹, J Naseer², S Punitha³

Affiliations

¹ Department of Physics, School of Engineering and Technology, Surya Group of Institutions, Vikravandi, Villupuram, Tamilnadu, 605652, India. jeyaram.msc@gmail.com.
² Department of Physics, St. Michael College of Engineering and Technology, Kalayarkoil, Sivaganga, Tamilnadu, 630551, India.
³ Department of Electrical and Electronics Engineering, Sri Manakula Vinayagar Engineering College, Madagadipet, Puducherry, 605107, India.

PMID: 34532787
DOI: 10.1007/s10895-021-02808-y

Abstract

The present work focuses the study of effect of solvent on third-order nonlinear optical (NLO) properties of reactive blue 19 dye dissolved in various polar solvents, namely ethanol, DMF and DMSO, respectively. Fourier Transform Infrared Spectroscopy (FT-IR) was used to find the functional groups present in reactive blue 19 dye. Third-order NLO features of reactive blue 19 dye was examined by a low power continuous wave laser of 650 nm wavelength. Reactive blue 19 dye exhibit negative nonlinear index of refraction of the power of 10^-7 cm²/W and the nonlinear coefficient of absorption of the order of 10^-3 cm/W. Both positive and negative nonlinear absorption coefficient of reactive blue 19 dye in different polar solvents is due to the characteristic behavior of saturable and reverse saturable absorption. Third-order NLO susceptibility of reactive blue 19 dye in polar solvents was determined to be the power of 10^-6 esu. The experimental results reveal that the dye sample reactive blue 19 is a potential material for nonlinear optical applications.

Keywords: FT-IR; NLO susceptibility; Polar solvents; Z-scan.