title: Scalar time domain modeling and coupling of second harmonic generation process in GaAs discontinuous optical waveguide.
abstract: We present in this work the scalar potential formulation of second harmonic generation process in chi((2)) nonlinear analysis. This approach is intrinsically well suited to the applications of the concept of circuit analysis and synthesis to nonlinear optical problems, and represents a novel alternative method in the analysis of nonlinear optical waveguide, by providing a good convergent numerical solution. The time domain modeling is applied to nonlinear GaAs asymmetrical waveguide with dielectric discontinuities in the hypothesis of quasi phase matching condition in order to evaluate the efficiency conversion of the second harmonic signal. The accuracy of the modeling is validated by the good agreement with the published experimental results. The effective dielectric constant method allows to extend the analysis also to 3D optical waveguides.
authors.affiliation: National Nanotechnology Laboratory of CNR-INFM, Distretto Tecnologico-ISUFI, Università del Salento, Via Arnesano 16, 73100 Lecce, Italy. alessandro.massaro@unile.it
authors.forename: A
authors.initials: A
authors.lastname: Massaro
authors.forename: V
authors.initials: V
authors.lastname: Tasco
authors.forename: M T
authors.initials: MT
authors.lastname: Todaro
authors.forename: R
authors.initials: R
authors.lastname: Cingolani
authors.forename: M
authors.initials: M
authors.lastname: De Vittorio
authors.forename: A
authors.initials: A
authors.lastname: Passaseo
mesh_terms: D001152:Arsenicals / Q000737:chemistry*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium