Slow light in flight imaging

Wilson, Kali and Little, Bethany and Gariepy, Genevieve and Henderson, Robert and Howell, John and Faccio, Daniele (2017) Slow light in flight imaging. Physical Review A, 95 (2). 023830. ISSN 2469-9926 (https://doi.org/10.1103/PhysRevA.95.023830)

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Abstract

Slow-light media are of interest in the context of quantum computing and enhanced measurement of quantum effects, with particular emphasis on using slow light with single photons. We use light-in-flight imaging with a single-photon avalanche diode camera array to image in situ pulse propagation through a slow-light medium consisting of heated rubidium vapor. Light-in-flight imaging of slow-light propagation enables direct visualization of a series of physical effects, including simultaneous observation of spatial pulse compression and temporal pulse dispersion. Additionally, the single-photon nature of the camera allows for observation of the group velocity of single photons with measured single-photon fractional delays greater than 1 over 1 cm of propagation.

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