%0 Journal Article %J Optics Letters %D 2011 %T Contradirectional couplers in silicon-on-insulator rib waveguides %A Shi, Wei %A Wang, Xu %A Zhang, Wen %A Chrostowski, Lukas %A Jaeger, Nicolas %N 20 %P 3999 - 4001 %U http://www.opticsinfobase.org/abstract.cfm?URI=ol-36-20-3999 %V 36 %8 09/2011