Electromagnetically induced negative refractive index in dense atomic gas
Chinese Optics Letters, Vol. 5, Issue S1, pp. S222-S225 (2007)
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Abstract
We propose two dense gas schemes of four-level 'Lambda'-type and V-type atoms based on the effect of quantum coherence. It is shown that under certain conditions the dense gas can simultaneously exhibit negative permittivity and negative permeability, and thus become a negative refractive-index material. Furthermore, by analyzing the absorption property of the left-handed materials, we find that the absoption can be reduced via choosing appropriate parameters. Such schemes might be used to fabricate isotropic and homogeneous left-handed material with vanishing absorption in a wider optical frequency band.
© 2007 Chinese Optics Letters
OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(240.5420) Optics at surfaces : Polaritons
(260.2030) Physical optics : Dispersion
Citation
Hongjun Zhang, Yueping Niu, Shiqi Jin, Ruxin Li, and Shangqing Gong, "Electromagnetically induced negative refractive index in dense atomic gas," Chin. Opt. Lett. 5, S222-S225 (2007)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-5-S1-S222
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