Improved nonlinear slot waveguides using dielectric buffer layers: properties of TM waves

作     者：Elsawy, Mahmoud M. R. Renversez, Gilles 

作者机构：Aix Marseille Univ CNRS Inst Fresnel UMR 7249 Ecole Cent Marseille F-13013 Marseille France 

出 版 物：《OPTICS LETTERS》 (光学快报)

年 卷 期：2016年第41卷第7期

页      面：1542-1545页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：Kerr effect Spatial solitons Waveguides slab Surface plasmons 

摘      要：We propose an improved version of the symmetric metal slot waveguides with a Kerr-type nonlinear dielectric core adding linear dielectric buffer layers between the metal regions and the core. Using a finite element method to compute the stationary nonlinear modes, we provide the full phase diagrams of its main transverse magnetic modes as a function of the total power, buffer layer, and core thicknesses that are more complex than the ones of the simple nonlinear metal slot. We show that these modes can exhibit spatial transitions toward specific modes of the new structure as a function of power. We also demonstrate that, for the main modes, the losses are reduced compared to the previous structures, and that they can now decrease with power. Finally, we describe the stability properties of the main stationary solutions using nonlinear FDTD simulations. (C) 2016 Optical Society of America