Buffer-gas-induced narrowing of electromagnetically induced transparent spectra for an open system |
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| Authors: | Z F Hu C G Du Y Z Wang |
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| Affiliation: | 1. The Key Laboratory of Quantum Optics , Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Science , Shanghai, P.O. Box 201800, China huzhengfeng@tsinghua.org.cn;3. Department of Physics , Tsinghua University , Beijing, 100084, China;4. The Key Laboratory of Quantum Optics , Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Science , Shanghai, P.O. Box 201800, China |
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| Abstract: | We have investigated the spectra of the electromagnetically induced transparency (EIT) when a cell is filled with a buffer gas. Our theoretical results show that the buffer gas can induce a narrower spectra line and steeper dispersion than those of the usual EIT case in a homogeneous and Doppler broadened system. The linewidth decreases with the increase of the buffer gas pressure. This narrow spectra may be applied to quantum information processing, nonlinear optics and atomic frequency standard. |
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