Second- and Third-Order Nonlinearities of Novel Push−Pull Azobenzene Polymers

Abstract

In this work, the second- and third-order nonlinear optical response of spin-deposited thin films of three different push-pull side chain azobenzene polymers is investigated by the second- and third-harmonic Maker fringes techniques using 30 ps laser pulses at a fundamental wavelength of 1064 nm. Measurements were carried out before and after aligning the chromophores by corona poling of the films, while different polarization configurations have been utilized. Strong dependence of the response upon the structure of the systems has been found, which is related to the different charge transfer within the molecules. The reported findings are compared with already published results.

Optoelectronic and photoacoustic studies of an organic dye synthesized through green route

“…Comparison of the reported studies of the nonlinear optical properties of novel azo benzenes [7], suggests that the dyes possess large third order nonlinear optical properties. In addition, the dye shows good photoacoustic response which suggests their applicability as contrast agents in PA imaging.…”

Electro-Optical Properties in Thin Films of New Azobenzene Polymers

“…The 4-(N-еthyl-N-(2-hydroxyethyl)amino)-4-cyanoazobenzene and 4-(N-еthyl-N-(2-hydroxyethyl)amino)-4'-(4-nitrophenylazo)azobenzene molecules were prepared by coupling with the diazonium salt of 4-aminobenzonitrile or 4-(4-nitrophenylazo)aniline and further with 2-(N-ethylanilino)ethanol according to the procedure published previously [21]. The azobenzene methacrylate monomers were synthesized by reaction of azobenzene alcohols with methacryloyl chloride in the presence of triethylamine as nucleophilic catalyst and hydrochloric acid acceptor.…”

“…Azomonomer was synthesized in the same way as reported in [21]. The solid was recrystallized from methanol.…”

Novel Styrylquinolinium Dye Thin Films Deposited by Pulsed Laser Deposition for Nonlinear Optical Applications

“…Crystallization from absolute ethanol resulted to white crystals of lepidinium ethyl bromide. The resulting material was dried under vacuum and kept over P 2 O 5 2.2. Film Deposition.…”