Addressing and imaging microring resonators with optical evanescent light

We show that optical evanescent light can be used to simultaneously address and image microring resonators. The optical addressing function is based on control of the overlap between a three-dimensional evanescent light spot and a linear dielectric ridge connected to the resonator. When detected with a Photon Scanning Tunnelling Microscope (PSTM), the evanescent light tailing off the device provides precise optical images of the light distribution inside and around the resonator. The complete phenomenon has been calculated numerically using the three-dimensional Green Dyadic Method.