Abstract
We include the effect of density-dependent near dipole-dipole interactions in order to generalize the theory of a simple three-level system that exhibits lasing without inversion and an enhanced index of refraction at zero absorption. For certain values of atomic density, our generalized theory predicts a novel enhancement of inversionless gain and absorptionless index by more than 2 orders of magnitude.
- Received 11 September 1992
DOI:https://doi.org/10.1103/PhysRevLett.70.1421
©1993 American Physical Society