Volume 116, Number 5, December 2016
|Number of page(s)||5|
|Section||Atomic, Molecular and Optical Physics|
|Published online||11 January 2017|
Two-dimensional localization of an atom with sub-half-wavelength spatial resolution via coherently controlled spontaneous emission
1 School of Science, Jilin Institute of Chemical Technology - Jilin 132022, China
2 Department of Physics, Harbin Institute of Technology - Harbin 150001, China
Received: 28 September 2016
Accepted: 20 December 2016
We propose a scheme for two-dimensional sub-half-wavelength atom localization using two lasers with equal frequencies, and obtain the analytical expression of conditional position probability (CPP) using a spontaneous-emission spectrum for a four-level atom which passes through two-dimensional orthogonal standing-wave fields. The quantum interference effect between two decay channels leads to extreme spectral narrowing and quenching of spontaneous emission in some regions of the standing-wave field, which results in the appearance of a high-spatial-resolution localization peak. The two-dimensional sub-half-wavelength atom localization is obtained with high precision and high spatial resolution by adjusting the relative phase and detuning.
PACS: 32.80.Qk – Coherent control of atomic interactions with photons / 42.50.Ct – Quantum description of interaction of light and matter; related experiments
© EPLA, 2016
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