How to realize a negative refractive index material at the atomic level in an optical frequency range?
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- Shen, J., Ruan, Z. & He, S. J. Zheijang Univ.-Sci. (2004) 5: 1322. doi:10.1631/jzus.2004.1322
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The theoretical mechanism for realizing a negative refractive index material in an optical frequency range with an atomic gas system of electromagnetically induced transparency (EIT) is studied. It is shown that under certain conditions such a dense gas can exhibit simultaneously negative permittivity and negative permeability, and negligibly small loss.