Tuning the coherent interaction in an on-chip photonic-crystal waveguide-resonator system

We experimentally demonstrated that the characteristics of the coherent interaction between two waveguide-coupled resonators can be drastically tuned by changing the propagation phase in the waveguide. In particular, the transmission line shape can be tuned between an electromagnetically induced transparency like optical resonance and a flat-top reflection filter. (C) 2010 American Institute of Physics. [doi:10.1063/1.3486686]