Open AccessDoubly resonant metallic nanostructure for high conversion efficiency of second harmonic generation
Author(s) -
Sinjeung Park,
Jae Won Hahn,
Jae Yong Lee
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.004856
Subject(s) - second harmonic generation , optics , resonance (particle physics) , harmonic , energy conversion efficiency , plasmon , materials science , high harmonic generation , optoelectronics , nonlinear optics , surface plasmon polariton , surface plasmon resonance , aperture (computer memory) , reflection (computer programming) , photonics , diffraction , surface plasmon , physics , nanotechnology , nanoparticle , atomic physics , laser , quantum mechanics , acoustics , computer science , programming language
The recent discovery of strong nonlinear emission in metallic nanostructures has offered possibilities for realization of functional nano photonic devices. Here, we demonstrate a novel design of a plasmonic nano device for high conversion efficiency of second harmonic generation. A 4 × 4 bowtie aperture array is fabricated to have both plasmonic resonance for local field enhancement of the fundamental wave and Fabry-Pérot resonance for high transmission of second harmonic wave. Combining nano structures for exciting surface plasmon polariton and suppressing higher order diffraction and anti-reflection layer, we achieve a second harmonic conversion efficiency of 1.4 × 10(-8) that is nearly an order of magnitude larger than the results published in recent literatures. We also theoretically analyze evidences of the role of double resonances tuned to the fundamental wave and the second harmonic wave, resulting in the augmentation of second harmonic response approximately an order of magnitude greater than that without the help of the resonance.