期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.173901
关键词
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资金
- Vienna Science and Technology Fund (WWTF) [MA09-030]
- Austrian Science Fund (FWF) [SFB IR-ON F25-14]
- Swiss NSF [PP00P2-123519/1]
- NSF [EEC-0540832, DMR-0908437]
- DARPA [N66001-11-1-4162]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [908437] Funding Source: National Science Foundation
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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