Negative refraction with low absorption using EIT in a four-level left-handed atomic system |
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Authors: | Shun-Cai Zhao Zheng-Dong Liu Jun Zheng Gen Li Nian Liu |
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Institution: | 1. Physics Department, Kunming University of Science and Technology, Kunming 650093, PR China;2. Engineering Research Center for Nanotechnology, Nanchang University, Nanchang 330047, PR China;3. Institute of Modern Physics, Nanchang University, Nanchang 330031, PR China |
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Abstract: | We suggest a scheme for obtaining negative refraction with low absorption in a left-handed atomic system. Under the appropriate conditions, the atomic system displays negative refraction with negative permittivity and permeability (left-handedness) in a common frequency range, simultaneously. And the imaginary parts of permittivity and permeability show transparently propagate in the same frequency range. Finally, the negative refraction show low absorption due to the EIT effect, and the figure of merit demonstrated this in this resonant atomic system. |
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