Pump-induced Exceptional Points in Lasers

Details Pump-induced Exceptional Points in Lasers Pump-induced Exceptional Points in Lasers

2011-09-02

arxiv.org/abs/1109.0454v2

Phys. Rev. Lett. 108, 173901 (2012)

Physics

Optics

4.5 pages, 4 figures, final version including additional FDTD data

Scientific paper

10.1103/PhysRevLett.108.173901

We demonstrate that the above-threshold behavior of a laser can be strongly affected by exceptional points which are induced by pumping the laser nonuniformly. At these singularities, the eigenstates of the non-Hermitian operator which describes the lasing modes coalesce. In their vicinity, the laser may turn off even when the overall pump power deposited in the system is increased. Such signatures of a pump- induced exceptional point can be experimentally probed with coupled ridge or microdisk lasers.

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