Abstract
By coupling a probe transition to a Rydberg state using electromagnetically induced transparency (EIT) we map the strong dipole-dipole interactions onto an optical field. We characterize the resulting cooperative optical nonlinearity as a function of probe strength and density. We demonstrate good quantitative agreement between the experiment and an -atom cooperative model for atoms per blockade sphere and the Rydberg state. The measured linewidth of the EIT resonance places an upper limit on the dephasing rate of the blockade spheres of .
- Received 21 June 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.193603
© 2010 The American Physical Society