Abstract
Leaky modes are important when optical waveguides fail to confine light completely. Computing waveguide modes to high accuracy is challenging if the waveguide has high index-contrast and sharp corners. The propagation constant of a leaky mode is complex, its imaginary part is an important physical quantity (the decay rate along the waveguide axis). To find complex propagation constants with a small imaginary part, high-accuracy numerical solutions are necessary. The pseudospectral modal method (PSMM), originally developed for diffraction gratings, has recently been reformulated as a full-vectorial waveguide mode solver. In this letter, the PSMM is extended to analyze two challenging waveguide benchmark problems involving leaky modes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have