All-optical routing of single photons by a one-atom switch controlled by a single photon

21 08/2014

Thursday, 21 Aug. 2014, 16:00 - 17:00

Presenter: Itay Shomroni, Weizmann Institute of Science, Rehovot, Israel
Host: M. Aspelmeyer
Where: Schrödingerroom, 4th floor, Boltzmanngasse 5, 1090 Wien

Abstract:

The prospect of quantum networks, in which quantum information is carried by single photons in photonic circuits, has long been the driving force behind the effort to achieve all-optical routing of single photons. In this talk I'll present a demonstration of the most basic units of such a photonic circuit: a single-photon activated switch, capable of routing a photon from any of its two inputs to any of its two outputs. Our device is based on a single 87Rb atom coupled to a fiber-coupled, chip-based microresonator, and is completely all-optical, requiring no other fields beside the in-fiber single-photon pulses.

I. Shomroni, S. Rosenblum, Y. Lovsky, O. Bechler, G. Guendelman, B. Dayan, Science Express (DOI: 10.1126/science.1254699)