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., et al. “Unidirectional Lasing Emerging from Frozen Light in Nonreciprocal Cavities.” Physical Review Letters, vol. 112, no. 4, American Physical Society, Jan. 2014, p. 043904, doi:10.1103/PhysRevLett.112.043904.
Physical Review Letters