Authors: Zahra Adelpour Ayaz Ghorbani Vahid Ahmadi
Publish Date: 2015/03/22
Volume: 10, Issue: 5, Pages: 1231-1238
Abstract
A longrange dielectricloaded SPP waveguide LRDLSPPW featuring tight mode confinement long propagation length and highly nonlinear response is proposed Finite element method FEM simulation of linear analysis is followed by numerical solution of the generalized nonlinear Schrödinger equation GNLSE Nonlinear propagation of the plasmonicguided mode along the LRDLSPPW is supposed to be originated from the thermomodulational nonlinearity of the metal strip and the thirdorder nonlinear susceptibility of the dielectric ridge section The results manifest the appearance of an intense spectral redshift and self phase modulation SPM caused by the delayed thermomodulational nonlinearity of metal Increment of the input power highlights the thirdorder nonlinearity effect of the ridge section which is associated with the pulse splitting of the input Lowinput threshold power for the observation of nonlinear effects due to low propagation loss of the structure and local field enhancement nature of plasmonic waves is a distinguished feature of the proposed LRDLSPPW configuration which is valuable for applications involving nonlinear phenomenon
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