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Continuously tunable sub-half-wavelength localization via coherent control of spontaneous emission |
| Wang Fei (王飞)a, Gong Cheng (龚成)b, Tan Xin-Yu (谭新玉)a, Shi Wen-Xing (石文星 )c |
a College of Science, New Energy Research Institute, China Three Gorges University, Yichang 443002, China;
b State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
c School of Physics & Information Engineering, Jianghan University, Wuhan 430056, China |
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Abstract We propose a continuously tunable method of the sub-half-wavelength localization via the coherent control of the spontaneous emission of a four-level Y-type atomic system, which is coupled to three strong coupling fields including a standing-wave field together with a weak probe field. It is shown that the sub-half-wavelength atomic localization is realized for both resonance and off-resonance cases. Furthermore, by varying the probe detuning in succession, the positions of the two localization peaks are tuned continuously within a wide range of probe field frequencies, which provides convenience for the realization of sub-half-wavelength atomic localization experimentally.
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Received: 22 March 2012
Revised: 22 May 2012
Accepted manuscript online:
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PACS:
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11104163 and 11047011) and the Science Foundation of Hubei Province, China (Grant No. 2010CDZ055). |
Corresponding Authors:
Wang Fei
E-mail: feiwang202@163.com
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Cite this article:
Wang Fei (王飞), Gong Cheng (龚成), Tan Xin-Yu (谭新玉), Shi Wen-Xing (石文星 ) Continuously tunable sub-half-wavelength localization via coherent control of spontaneous emission 2012 Chin. Phys. B 21 114206
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