Abstract
The left-handedness was demonstrated by the simulation with a three-level quantum system in an Er3+-dopped ZrF4–BaF2–LaF3–AlF3–NaF (ZBLAFN) optical fiber. And the left-handedness can be regulated by the incoherent pumping field. Our scheme may provide a solid candidate other than the coherent atomic vapor for left-handedness, and may extend the application of the rare-earth-ion-doped optical fiber in metamaterials and of the incoherent pumping light field in quantum optics.
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