Open AccessSecond Harmonic Generation enhancement by use of annular aperture arrays embedded into silver and filled by lithium Niobate
Author(s) -
Elsie Barakat,
Maria–Pilar Bernal,
Fadi Baida
Publication year - 2010
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.18.006530
Subject(s) - lithium niobate , optics , materials science , second harmonic generation , aperture (computer memory) , nonlinear optics , wavelength , dielectric , signal (programming language) , optoelectronics , second harmonic imaging microscopy , physics , laser , computer science , acoustics , programming language
We propose and theoretically study a metallo-dielectric photonic crystal (MDPhC) based on metallic annular aperture arrays (AAA) associated to a nonlinear material (LiNbO(3)) for the second harmonic generation (SHG). An optimal structure design can be found thanks to the relations that link the geometrical parameters to the operating point namely the wavelength of the fundamental and SHG signals. A slow light phenomenon, which occurs at the cut-off frequency of the guided mode through the annular cavities, is at the origin of the SHG signal enhancement. The benefit of the AAA is demonstrated through a comparison with cylindrical aperture arrays.