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


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)