  Moir\'e interlayer exciton in transition metal dichalcogenide heterobilayer
features a permanent electric dipole that enables the electrostatic control of
its flow, and optical dipole that is spatially varying in the moir\'e
landscape. We show the hybridization of moir\'e interlayer exciton with photons
in a planar 2D cavity leads to two types of moir\'e polaritons that exhibit
distinct forms of topological transport phenomena including the spin/valley
Hall and polarization Hall effects, which feature remarkable electrical
tunability through the control of exciton-cavity detuning by the interlayer
bias.
