Open AccessEnhancement of second-harmonic generation from silicon nitride with gold gratings
Author(s) -
Tingyin Ning,
Chunlei Tan,
Tapio Niemi,
Martti Kauranen,
Goëry Genty
Publication year - 2015
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.23.030695
Subject(s) - materials science , grating , optics , silicon nitride , silicon , second harmonic generation , optoelectronics , rigorous coupled wave analysis , diffraction grating , guided mode resonance , nonlinear optics , physics , laser
We report strong enhancement of second-harmonic generation in a hybrid nanostructure with gold gratings embedded in a silicon nitride film. Compared to a flat silicon nitride film, the enhancement factor can be as large as 10 2 to 10 3 for transverse magnetic and electric polarizations, respectively in good agreement with numerical results calculated using finite element method. For both polarizations, the enhancement arises from a resonance between the waveguide modes and grating.