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Proceedings Paper

Suboptical wavelength atomic gratings generated in a time-domain interferometer
Author(s): Andrey V. Turlapov; Dmitry V. Strekalov; A. Kumarakrishnan; Sydney B. Cahn; A. Karpf; Tycho Sleator
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Paper Abstract

We have studied sub-optical wavelength atomic gratings generated by the interference of atomic de Broglie waves in a time-domain interferometer. Three short optical standing- wave pulses, detuned from resonance with a cloud of approximately 100 (mu) K 85Rb atoms, act as phase gratings for atomic matter waves. Shortly after the first pulse, a modulation in the atomic density containing spatial harmonics of period (lambda) /2N appears ((lambda) is the optical wavelength, and N is any integer) and then rapidly vanishes due to the atomic thermal motion. The cloud maintains phase memory of this modulation, however, and the second pulse (applied at time T after the first one) results in a temporal sequence of atomic density gratings of periods (lambda) /2N. The appearance of a grating is referred to as an echo. The third pulse (and a subsequent traveling wave pulse) is used to detect these gratings. By this technique, we have created and detected in real time a grating with period (lambda) /4 at time 1.5T after the first pulse and observed new types of `echoes' caused by interaction of the de Broglie waves with all three phase gratings. This ability to produce sub-wavelength structures makes our techniques applicable to atomic beam lithography.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354726
Show Author Affiliations
Andrey V. Turlapov, New York Univ. (United States)
Dmitry V. Strekalov, New York Univ. (United States)
A. Kumarakrishnan, Massachusetts Institute of Technology (United States)
Sydney B. Cahn, Yale Univ. (United States)
A. Karpf, New York Univ. (United States)
Tycho Sleator, New York Univ. (United States)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics
Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura, Editor(s)

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