Microring Modulator: PCell with Attached Model

The silicon microring modulator (MRM) of Yuan et al. [1] reaches 200 Gb/s per wavelength channel through a two-segment Z-shape p-n junction in the ring. The M2 routing electrode is split into two arcs around the ring; each arc drives an independent junction, and the two junctions combine optically inside the ring so that two binary drivers can produce a PAM-4 optical output.