Recently, we have demonstrated slow light propagation in coupled-resonator optical waveguides consisting of upto 235
directly-coupled silicon microrings. High resolution spectral measurements of light transmission and the scaling of
transport statistics with increasing length reveal that resonator excitations are mutually correlated, as expected from
theory. Successful light transmission through coherently-coupled resonator chains that are several hundreds of resonators
long is promising for future large-scale silicon photonic circuitry.