Engineered nonlinear materials using gold nanoantenna array

Vladimir P. Drachev, Alexander V. Kildishev, Joshua D. Borneman, Kuo Ping Chen, Vladimir M. Shalaev, Konstantin Yamnitskiy, Robert A. Norwood, Nasser Peyghambarian, Seth R. Marder, Lazaro A. Padilha, Scott Webster, Trenton R. Ensley, David J. Hagan, Eric W. Van Stryland

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Gold dipole nanoantennas embedded in an organic molecular film provide strong local electromagnetic fields to enhance both the nonlinear refractive index (n 2) and two-photon absorption (2PA) of the molecules. An enhancement of 53× for 2PA and 140× for nonlinear refraction is observed for BDPAS (4,4′-bis(diphenylamino)stilbene) at 600 nm with only 3.7% of gold volume fraction. The complex value of the third-order susceptibility enhancement results in a sign change of n 2 for the effective composite material relative to the pure BDPAS film. This complex nature of the enhancement and the tunability of the nanoantenna resonance allow for engineering the effective nonlinear response of the composite film.

Original languageEnglish (US)
Article number780
JournalScientific reports
Issue number1
StatePublished - Dec 1 2018

ASJC Scopus subject areas

  • General


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