| Abstract: | The various presented herein relate to an on-chip polarization beam
splitter (PBS), which is adiabatic for the transverse magnetic (TM) mode
and diabatic for the transverse electric (TE) mode. The PBS comprises a
through waveguide and a cross waveguide, wherein an electromagnetic beam
comprising TE mode and TM mode components is applied to an input port of
the through waveguide. The PBS can be utilized to separate the TE mode
component from the TM mode component, wherein the TE mode component exits
the PBS via an output port of the through waveguide, and the TM mode
component exits the PBS via an output port of the cross waveguide. The
PBS has a structure that is tolerant to manufacturing variations and
exhibits high polarization extinction ratios over a wide bandwidth. |