Lossless Negative Refraction in An Active Dense Gas of Atoms

Details Lossless Negative Refraction in An Active Dense Gas of Atoms Lossless Negative Refraction in An Active Dense Gas of Atoms

2007-11-02

arxiv.org/abs/0711.0303v1

Physics

Quantum Physics

4 figures

Scientific paper

Current designs for negative index materials are passive, such that they suffer from significant losses that prohibit applications, in particular towards optical frequencies. We predict, based on nonlinear optical Bloch equations, negative refraction with zero absorption in an active, i.e., amplifying, dense gas of atoms. External laser fields are used to tune the medium's electromagnetic response and an additional weak pumping field controls its absorption properties. Metastable Neon is identified as a suitable experimental candidate at infrared frequencies to implement a lossless active negative index material.

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