Compared results of the variation of the eigenvalues Δn eff with our variational method based on time derivation operator (TDO), that is equation (23) and Figures 5a and 5b, and COMSOL software. As an example, the opto-geometric guiding structure is chosen at fixed parameters: optical indices ( n 1; n 2 ; n 3; n 4) = (2 ; 1.8 ; 1; 1.5),wavelength λ = 0.8 μm and 2h fixed = 0.4 μm, with dimension 2e = 0.2 μm.
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