We introduce a class of unidirectional lasing modes associated with the frozen mode regime of nonreciprocal slow-wave structures. Such asymmetric modes can only exist in cavities with broken timereversal and space inversion symmetries. Their lasing frequency coincides with a spectral stationary inflection point of the underlying passive structure and is virtually independent of its size. These unidirectional lasers can be indispensable components of photonic integrated circuitry.
Ramezani, H.; Kalish, S.; Vitebskiy, I.; and Kottos, T., "Unidirectional Lasing Emerging from Frozen Light in Nonreciprocal Cavities" (2014). Physics and Astronomy Faculty Publications and Presentations. 295.
Physical Review Letters