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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Young's double-slit interferometry with ultracold atoms

Fujio Shimizu, Kazuko Shimizu, Hiroshi Takuma

Published Oct 28, 1992• 3 citations
Publisher

Abstract

Young's double slit interferometry, electric focusing, and two dimensional trapping of a laser- cooled neon atomic beam in the 1s3 metastable state are demonstrated.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
DOI
10.1117/12.130389

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Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Michael W. Noel and C. R. Stroud, Jr., "Young's Double-Slit Interferometry within an Atom," Optics & Photonics News 6(12), 33-34 (1995) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

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Young's Double-Slit Interferometry within an Atom

Michael W. Noel, Carlos R. Stroud

An experiment is described which is an analog of Young's double-slit interferometer using an atomic electron instead of light. Two phase-coherent laser pulses are used to excite a single electron into a state of the form of a pair of Rydberg wave packets that are initially on opposite sides of the orbit. The two wave packets propagate and spread until they completely overlap, then a third phase-coherent laser pulse probes the resulting fringe pattern. The relative phase of the two wave packets is varied so that the interference produces a single localized electron wave packet on one side of the orbit or the other.

Physical Review Letters•Aug 14, 1995•98 citations
An atomic interferometer based on a Young's-type double-slit arrangement has been demonstrated. A supersonic beam of metastable helium atoms passes through a 2-\ensuremath{\mu}m-wide slit in a thin gold foil. This transversely coherent beam impinges on a second microfabricated transmission structure, consisting of two 1-\ensuremath{\mu}m-wide slits at a lateral distance of 8 \ensuremath{\mu}m. This double slit defines two possible paths on which the atoms can reach the detector slit. The good visibility of the observed fringes should make it possible to measure differential phase shifts in the interferometer of 1/3 rad in less than 10 min.
A double-slit interference of ultracold neon atoms in the 1s3{\mathit{s}}_{3}s3​ metastable state is studied. The interferometer is aligned vertically, and because of gravity acceleration the atom changes its velocity as much as 2 m/s during the passage of the interference. The interference fringes are observed for the initial atomic velocity between 0 and 2 m/s.
An experiment is described which is an analog of Young's double-slit interferometer using an atomic electron instead of light. Two phase-coherent laser pulses are used to excite a single electron into a state of the form of a pair of Rydberg wave packets that are initially on opposite sides of the orbit. The two wave packets propagate and spread until they completely overlap, then a third phase-coherent laser pulse probes the resulting fringe pattern. The relative phase of the two wave packets is varied so that the interference produces a single localized electron wave packet on one side of the orbit or the other.