Nonlinear optical behavior of DNA-functionalized gold nanoparticles

• Published in: Applied nanoscience 2019-07, Vol.9 (5), p.703-708
• Main Authors: Kulyk, B., Krupka, O., Smokal, V., Figà, V., Czaplicki, R., Sahraoui, B.
• Format: Article
• Language: English
• Subjects: Aniline; Chemistry and Materials Science; Deoxyribonucleic acid; DNA; Glass substrates; Gold; Harmonic generations; Laser beams; Materials Science; Membrane Biology; Nanochemistry; Nanoparticles; Nanotechnology; Nanotechnology and Microengineering; Nonlinear optics; Nonlinear response; Optical properties; Original Article; Physics; Thin films
• ISSN: 2190-5509; 2190-5517
• DOI: 10.1007/s13204-018-0704-1

The third-order nonlinear optical properties of gold nanoparticles embedded in the DNA-based composites were investigated by means of the third harmonic generation. With this purpose, the thin films comprising DNA-based complexes and Au nanoparticles were spin-deposited on glass substrate and their optical and nonlinear optical features were studied using the Maker-fringe technique at a laser fundamental wavelength of 1064 nm. The values of the third-order susceptibility χ (3) (− 3 ω ; ω , ω , ω) of the composite films based on DNA complex doped with 5 wt% of N -ethyl- N -(2-hydroxyethyl)-4-(4-nitrophenylazo)aniline were found to be significantly higher than those for pure composite films. Meanwhile, the presence of Au nanoparticles noticeable decreases the third-order nonlinear response of DNA-based composite mainly due to the enhanced absorption and scattering of laser and generated beam, respectively.