We introduce a new scheme to design optical microcavities supporting high-Qmodes with unidirectional light emission. This is achieved by coupling a low-Qmode with unidirectional emission to a high-Q mode. The coupling is due toenhanced dynamical tunneling near an avoided resonance crossing. Numericalresults for a microdisk with a suitably positioned air hole demonstrate thefeasibility and the potential of this concept.
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