A four-level atom, driven by a coherent field, is considered. We show that under certain conditions complete quenching of spontaneous emission is possible. Hence the population inversion on some specific atomic transitions can be created using a very weak incoherent pumping. We investigate the physics of the effect using bare and dressed states. The proposed scheme may be useful, in principle, for generation of high-frequency and/or high power laser light.
|Number of pages||12|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Jun 1997|
Scopus Subject Areas
- Atomic and Molecular Physics, and Optics