Interferometric measurement of the helical mode of a single photon

Details Interferometric measurement of the helical mode of a single photon Interferometric measurement of the helical mode of a single photon

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13e3017g&link_type=abstract

New Journal of Physics, Volume 13, Issue 5, pp. 053017 (2011).

Physics

Scientific paper

We present measurements of the helical mode of single photons and do so by sending heralded photons through a Mach-Zehnder interferometer that prepares the light in a helical mode with topological charge one, and interferes it with itself in the fundamental non-helical mode. Masks placed after the interferometer were used to diagnose the amplitude and phase of the mode of the light. Auxiliary measurements verified that the light was in a non-classical state. The results are in good agreement with theory. The experiments demonstrate in a direct way that single photons carry the entire spatial helical-mode information.

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