Efficient all-optical switching using slow light within a hollow-core fiber

By M. Bajcsy, ... , V. Vuletic & M. Lukin

We demonstrate a fiber-optical switch that is activated at tiny energies corresponding to a few hundred optical photons per pulse. This is achieved by simultaneously confining both photons and a small laser-cooled ensemble of atoms inside the microscopic hollow core of a single-mode photonic-crystal fiber and using quantum optical techniques for generating slow light propagation and large nonlinear interaction between light beams.

**Groupmeeting by Luciano Cruz**