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BENTHAM SCIENCE PUBLISHERS eBooks

Atomic Localization and its application in atom nano-lithograph

Luling Jin, Yueping Niu, Hui Sun, Shiqi Jin, Shangqing Gong

Published Jan 1, 2009• 0 citations
Publisher

Abstract

In this chapter, we give a brief review of our recent research work related to atomic localization via the effects of atomic coherence and quantum interferences, as well as its application in atom nano-lithograph, which includes atomic localization based on double-dark resonance effects, sub-half-wavelength localization via two standing-wave fields and an atom nano-lithograph scheme via two orthogonal standing-wave fields, etc..

DOI
10.2174/978160805085711001010038

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In this chapter, we give a brief review of our recent research work related to atomic localization via the effects of atomic coherence and quantum interferences, as well as its application in atom nano-lithograph, which includes atomic localization based on double-dark resonance effects, sub-half-wavelength localization via two standing-wave fields and an atom nano-lithograph scheme via two orthogonal standing-wave fields, etc..
A scheme of two-dimensional (2D) atom localization based on the interference of double-dark resonances is proposed, in which the N-type atom interacts with two orthogonal standing-wave fields. Because of the spatial-dependent atom–field interaction, 2D atom localization can be realized via measuring the upper state population or the probe absorption. We obtain that the maximum probability of finding an atom at a particular position in a wavelength domain (λ1×λ2) is 1/2 when the atom is localized at the intersection of the antinodes of quadrants I and III of the standing-wave plane. This scheme shows more advantages than other schemes of 2D atom localization.
A scheme of atom localization based on the interference of resonance of double-dark states is proposed, in which the atom interacts with a classical standing-wave field. It is found that the localization property is significantly improved due to the interaction of double-dark resonances. It is realized that the atom is localized just at the nodes of the standing-wave field with higher precision. Moreover, an improvement by a factor of 2 in the detecting probability of a single atom within the subwavelength domain can be achieved by adjusting the probe-field detuning. This scheme shows more advantages than other schemes of atom localization.