Recent advances and results in waveguide shape optimisation techniques

We show how judicious usage of optimisation techniques combined with a rigorous Maxwell solver can be used to create novel designs such as ultra-short injection devices capable of efficiently channeling light in much shorter lengths than conventional tapers. The full Maxwell solver optimisation techniques used herein have wide applicability generating results rich in physics and application ranging from novel fiber designs to efficient high-contrast integrated-optic waveguides (even 3.5:1 for semiconductors:air).