Parity anomaly laser.

We propose a novel supersymmetry-inspired scheme for achieving disorder-robust single mode lasing in arrays of coupled microcavities, based on factorizing a given array Hamiltonian into its `supercharge' partner array. Pumping a single sublattice of the partner array preferentially induces lasing of an unpaired zero mode. Similar to 1D topological arrays, the zero mode is protected against coupling disorder. On the other hand, it need not be localized to domain walls or edges; it can be designed to have a uniform intensity profile, maximizing mode competition.