Low-light-level nonlinear optics with slow light

Details Low-light-level nonlinear optics with slow light Low-light-level nonlinear optics with slow light

2003-09-10

arxiv.org/abs/quant-ph/0309084v1

Physics

Quantum Physics

to be published in PRA

Scientific paper

10.1103/PhysRevA.68.041801

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 density of $\sim23$ photons per $\lambda^2/(2\pi)$ causes a 1/e absorption of a second pulse.

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