Analysis of a polarization-independent nonlinear cross-slot waveguide with Fourier Modal Method (FMM)

Somnath Paul; Jani Tervo; Seppo Honakanen

doi:10.1117/12.2048994

1 May 2014 Analysis of a polarization-independent nonlinear cross-slot waveguide with Fourier Modal Method (FMM)

Somnath Paul, Jani Tervo, Seppo Honakanen

Proceedings Volume 9133, Silicon Photonics and Photonic Integrated Circuits IV; 913313 (2014) https://doi.org/10.1117/12.2048994
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

We propose the Fourier Modal Method (FMM) as a convenient numerical tool for the design and analysis of nonlinear optical waveguides. The scope of this work includes the design of a polarization-independent nonlinear cross-slot waveguide for telecommunication applications at the wavelength of 1550 nm. The FMM method has been implemented, obeying the proper Fourier factorization rules, within a MATLAB^TM environment. The influence of the modal field intensity on the transverse refractive index distribution due to the optical Kerr effect is modeled with FMM for a propagation invariant scheme of the waveguide. The waveguide is geometrically optimized for an enhanced nonlinear light matter interaction. A silicon-inorganic hybrid material platform based on hydrogenated amorphous silicon (a-Si:H) and amorphous titanium dioxide (TiO₂) is considered for the mentioned waveguide. With the optimized design of the waveguide, the achieved value of the nonlinear waveguide parameter (γ) is 4.678 × 10⁴ W^-1Km^-1.

Citation Download Citation

Somnath Paul, Jani Tervo, and Seppo Honakanen "Analysis of a polarization-independent nonlinear cross-slot waveguide with Fourier Modal Method (FMM)", Proc. SPIE 9133, Silicon Photonics and Photonic Integrated Circuits IV, 913313 (1 May 2014); https://doi.org/10.1117/12.2048994

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