Photonic-bandgap structures in planar nonlinear waveguides: application tosecond-harmonic generation

Citation
D. Pezzetta et al., Photonic-bandgap structures in planar nonlinear waveguides: application tosecond-harmonic generation, J OPT SOC B, 18(9), 2001, pp. 1326-1333
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
ISSN journal
0740-3224 → ACNP
Volume
18
Issue
9
Year of publication
2001
Pages
1326 - 1333
Database
ISI
SICI code
0740-3224(200109)18:9<1326:PSIPNW>2.0.ZU;2-L
Abstract
Second-harmonic generation (SHG) is investigated in a planar waveguide geom etry under conditions for which the Use of a linear grating fabricated on t op of the waveguide reproduces a photonic-bandgap structure. The fundamenta l mode of the guide, which coincides with the fundamental pump frequency, i s tuned at the photonic band-edge resonance in order to enhance field-local ization effects. However, the linear grating alone is not able to produce b oth field confinement and phase matching of the second-harmonic-generation process. Phase matching is obtained with the additional modulation of the n onlinear susceptibility chi ((2)), as in conventional quasi-phase-matching schemes. The conversion efficiency achieved with both linear and nonlinear gratings is orders of magnitude greater than that of a quasi-phase-matched device of the same length. (C) 2001 Optical Society of America.