%0 Journal Article %J Optics Letters %D 2010 %T Design and Characterization of Microring Reflectors with a Waveguide Crossing %A Shi, Wei %A Vafaei, Raha %A Guillen, Miguel %A Jaeger, Nicolas %A Chrostowski, Lukas %N 17 %P 2901-2903 %U http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-35-17-2901 %V 35 %X We present a novel design of a wavelength-selective reflector using a microring resonator integrated with a low-loss, low-crosstalk waveguide crossing. Functioning as a reflective notch filter, it can be used for optical communications and for sensor applications. The device is simulated using the transfer-matrix method combined with a 2D finite-difference mode solver and is fabricated by a CMOS-compatible silicon-on-insulator technology. The measurement shows an extinction ratio greater than 25 dB and a resonance-wavelength temperature dependence of 0.09 nm/K. %8 09/2010