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Nonlinear optical behavior of DNA-functionalized gold nanoparticles

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Details

Original languageEnglish
Pages (from-to)1-6
JournalApplied Nanoscience
Early online date5 Mar 2018
DOIs
Publication statusPublished - 2018
Publication typeA1 Journal article-refereed

Abstract

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 $(3)(−thinspace3$; $, $, $) 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.

Publication forum classification

Field of science, Statistics Finland