Abstract
Electromagnetically induced transparency in an optically thick, cold medium creates a unique system where pulse-propagation velocities may be orders of magnitude less than c and optical nonlinearities become exceedingly large. As a result, nonlinear processes may be efficient at low-light levels. Using an atomic system with three, independent channels, we demonstrate a quantum interference switch where a laser pulse with an energy per area of photons per causes a absorption of a second pulse.
- Received 25 April 2003
DOI:https://doi.org/10.1103/PhysRevA.68.041801
©2003 American Physical Society