Design and fabrication of nanophotonic devices

High index contrast integratable optical devices are investigated. Simulations are run on a parallel computer using an efficient wavelet FDTD code. For 2D photonic crystals with line defects and random perturbations, we have developed a numerically fast semi-analytical method. The effects due to sidewall roughnesses are studied for straight strips and for 2D photonic crystal line defect waveguides. For a microring filter and a photonic crystal slab, we compare numerical results to measurements using an upscaled microwave model. Fabrication steps for the material systems SOI and InGaAsP/InP are discussed, and FIB milling is demonstrated for GaAs/AlGaAs.