Open AccessSub-wavelength light localization in nanorod chain enhances second-harmonic generation
Author(s) -
Cristian Ciracì,
Emmanuel Centeno
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.015377
Subject(s) - nanorod , second harmonic generation , optics , energy conversion efficiency , nonlinear optics , wavelength , optoelectronics , materials science , omega , dielectric , nonlinear system , sum frequency generation , harmonic , physics , nanotechnology , laser , quantum mechanics
We demonstrate that nonlinear dielectric nanorod chains enhance the second-harmonic generation by taking advantage of subwavelength light confinement. We report a conversion efficiency higher than 10% for only 200 W input pump peak power in a 20 nanorod chain possessing a nonlinear susceptibility chi(2) = 10 pm/V. This giant frequency conversion is shown to originate from a lateral squeezing of the fundamental guided mode and from the combination of slow light at both frequencies omega and 2 omega. These results open an interesting route for the design of highly integrated efficient nonlinear devices.