Optical Properties of New Third-Order Nonlinear Materials Modified by Click Chemistry

Abstract

A high-yielding click reaction was used to synthesize a series of highly conjugated, symmetrical, as well as asymmetrical compounds with a benzene core. Cyclic voltammetry and ultraviolet/visible absorption spectroscopy were carried out, and proved that the side groups of the benzene derivatives played an important role in the energy gaps, and affected the third-order non-linear optical response. The maximum absorption wavelength of the series of benzene derivatives showed an obvious red-shift. Moreover, the addition of resilient electron-withdrawing groups significantly narrowed the energy levels as compared with precursors. The third-order nonlinear properties of this benzene derivative were tested by the Z-scan technique. The expected properties of this series of molecules were obtained, and it was found that the series of molecules undergoes a transition from reverse saturable absorption to saturable absorption, which has certain reference significance for a nonlinear optical field.

Enhanced NLO response and switching self-focussing in benzodiazepine derivative with –NO2 and -Br substitution

“…Recently, the scientific community has concentrated on enhancing materials' third-order nonlinear optical (NLO) properties for creating NLO gadgets in optoelectronic and photonics applications [ 1 , 2 ]. Organic NLO materials have recently been the focus of experimental and computational researchers due to their potential uses in modern technologies [ 3 ].…”