Post-selective two-photon interference from a continuous non-classical stream of photons emitted by a quantum dot

Details Post-selective two-photon interference from a continuous non-classical stream of photons emitted by a quantum dot Post-selective two-photon interference from a continuous non-classical stream of photons emitted by a quantum dot

2008-04-11

arxiv.org/abs/0804.1897v1

Physics

Quantum Physics

4 pages, 3 figures: for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.100.207405

We report an electrically driven semiconductor single photon source capable of emitting photons with a coherence time of up to 400 ps under fixed bias. It is shown that increasing the injection current causes the coherence time to reduce and this effect is well explained by the fast modulation of a fluctuating environment. Hong-Ou-Mandel type two-photon interference using a Mach-Zehnder interferometer is demonstrated using this source to test the indistinguishability of individual photons by post-selecting events where two photons collide at a beamsplitter. Finally, we consider how improvements in our detection system can be used to achieve a higher interference visibility.

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