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An adiabatic/diabatic polarization beam splitter

Cai, Hong; Boynton, Nicholas; Lentine, Anthony L.; Pomerene, Andrew P.; Trotter, Douglas C.; Starbuck, Andrew L.; Davids, Paul D.; DeRose, Christopher T.

We demonstrate an on-chip polarization beam splitter (PBS), which is adiabatic for the transverse magnetic mode, and diabatic for the transverse electric mode. The PBS has a simple structure that is tolerant to manufacturing variations and exhibits high polarization extinction ratios over a wide bandwidth.