Study of DFT, Synthesis, and Nonlinear Optical Properties of a Schiff Base Compound.

Abstract

A Schiff base (LS2) compound is synthesized via a reaction of a hot ethanolic solution of (3-ethoxy salcyaldehyde) and a hot ethanolic solution of amine(methyl-4-amino benzoate). The LS2 compound is characterized via ¹H and ¹³C NMR spectra, Mass spectrum, and FT-IR spectrum. We observed multiple diffraction patterns of a cw 473 nm laser beam from the LS2 compound caused by spatial self-phase modulation (SSPM). The nonlinear refractive index (NLRI) of the LS2 compound is estimated at the high-power input of the laser beam and found equals to 5.387 × 10^-7 cm²/W. The Z-scan techniques are used to estimate the NLRI and found equals to 0.12 × 10^-7 cm²/W. The all-optical switching (AOS) effect can be seen when 473 nm is used as the controlling beam and 532 nm is used as the controlled beam.