Focusing of an Atomic Beam by a Fresnel Atom Microlens

V. I. Balykin and V. G. Minogin*

Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190 Russia

*e-mail: minogin@isan.troitsk.ru

Received February 6, 2007

Abstract—Focusing of an atomic beam by a Fresnel atom microlens formed by an optical field diffracted by
an aperture whose size is comparable to or greater than the radiation wavelength is considered. It is shown that
the dipole gradient force enables one to focus the atomic beam to a spot of about 10 nm in diameter. The focus-
ing properties of a Fresnel atom microlens are analyzed within a model describing the dipole interaction of
rubidium atoms with monochromatic radiation near the D-line.

PACS numbers: 32.80.Pj, 42.50.Vk

DOI: 10.1134/S1063776107090026

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