![Focusing](Focusing.jpg)
![NanoLense](NanoholeLense.jpg)
Idea of atom lense based on the diffraction of the
de Broile waves on the aperture
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We
consider a new
approach to the atomic microscopy of the de Broglie waves based on the
diffraction rather than refraction phenomenon. It is demonstrated that
a
diffraction objective that images an object with a magnification of 103
can be implemented at appropriate
parameters of the atomic wave diffraction by a circular aperture in a
real screen. We analyze focusing of atomic beams by the atom near-field
microlenses
produced by the laser fields diffracted on the apertures in the
metallic screens. Analysis of the
focusing properties of the atom microlenses is given in a model
describing dipole interaction of atoms with a
far-off-resonance laser light. Two types of the atom microlenses are
considered: The Bethe-type microlens with aperture
less than the light wavelength and the Fresnel-type microlens with
aperture about the wavelength. It is
shown that both types of the atom microlenses are able to produce
strong dipole gradient forces which can
focus the atomic beams. However, while the Bethe-atom microlens is able
to produce sharp focusing of the
beams the Fresnel-atom microlens possesses weak focusing property due
to high anharmonicity of the
gradient force. We conclude that the Bethe-atom microlens can be
considered as a promising tool of the atom
optics potentially able to focus atomic beams into spot sizes about
nanometers.
References:
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V. I. Balykin and V. G. Minogin, "Focusing
of atomic beams by near-field atom microlenses: The Bethe-type and the
Fresnel-type microlenses", Phys. Rev. A, Vol.77, 013601 (2008)
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V. I. Balykin and V. G. Minogin, "Focusing
of an Atomic Beam by a Fresnel Atom Microlens", JETP, Vol. 105, No. 3,
pp. 479–485 (2007)
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V. I. Balykin, V. G. Minogin, and S. N.
Rudnev, "Atomic Beam Focusing by a Near-Field Atomic Microlens", JETP,
Vol. 103, No. 5, pp. 679–689, (2006)
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V.I.
Balykin, V.S. Letokhov,
V.V Klimov, "Atom Nano-Optics", Optics & Photonics News, V.4,
33 (2005)
- V.
I. Balykin, V. V. Klimov,
and V. S. Letokhov, "Atom Nanooptics Based on Photon Dots and Photon
Holes", JETP Letters, Vol. 78, 8 (2003).
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