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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Focusing a helium atom beam using a quantum-reflection mirror

H Christian Schewe, Bum Suk Zhao1, Gerard Meijer and Wieland Schöllkopf

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We demonstrate one-dimensional (1D) focusing of a thermal helium atom beam by quantum reflection from a cylindrical concave quartz mirror at near-grazing incidence. The smallest width of the focus achieved is 1.8 μm, essentially limited by spherical aberration. The various effects that contribute to the finite focal width have been investigated. We propose to apply near-grazing reflection from two concave elliptical mirrors in a Kirkpatrick–Baez arrangement for two-dimensional (2D) focusing of a helium atom beam, paving the way for a helium atom microprobe.


PACS

32.80.-t Photoionization and excitation

42.50.-p Quantum optics

Subjects

Atomic and molecular physics

Optics, quantum optics and lasers

Dates

Issue 11 (November 2009)

Received 23 July 2009

Published 17 November 2009



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