Jpn. J. Appl. Phys. 40 (2001) pp. 4544-4548  |Next Article|  |Table of Contents|
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Use of Bessel J₁ Laser Beam to Focus an Atomic Beam into a Nano-scale Dot

Kenji Okamoto, Yasushi Inouye and Satoshi Kawata

(Received December 11, 2000; accepted for publication April 11, 2001)

We propose a novel scheme to guide atomic beams with submicrometer spot sizes and beam propagation lengths of more than 1 centimeter. By using a Bessel J₁ beam for guiding atoms, the atoms are confined to the center dark region of the doughnut mode of J₁ beam. Our numerical analysis results show that a guided atomic beam maintains its width which is less than 100 nm. We also propose a scheme which combines the Bessel J₁ beam with a magneto-optical trap and a Bessel J₀ beam, where the unfocused part of an atomic flux, i.e., the background component, is suppressed.

URL: http://jjap.jsap.jp/link?JJAP/40/4544/
DOI: 10.1143/JJAP.40.4544

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