Keyu Xia, M. Alamri, M. Suhail Zubairy
Using a technique, analogous to coherent population trapping in an atomic system, we propose schemes to create transverse light propagation violating left-right symmetry in a photonic circuit consisting of three coupled waveguides. The frequency windows for the symmetry breaking of the left-right energy flow span over 200 \nano \meter. Our proposed system only uses linear passive optical materials and is easy to integrate on a chip.
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http://arxiv.org/abs/1303.6009
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