Integrated mode-evolution-based polarization splitter

A mode-evolution-based polarization splitter suitable for high-index-contrast systems and directly integratable with a recently reported on-polarization rotator is described and its performance verified through both finite-difference time-domain and eigenmode expansion simulations. For a device length of $200\mu \mathrm{m}$, greater than $22\mathrm{dB}$ of extinction is obtained across a $1.45–1.75\text{-}\mu \mathrm{m}$ bandwidth.