Electromagnetic-field quantization and spontaneous decay in left-handed media
Ho Trung Dung, Stefan Yoshi Buhmann, Ludwig Knöll, Dirk-Gunnar Welsch, Stefan Scheel
Abstract
We present a quantization scheme for the electromagnetic field interacting with atomic systems in the presence of dispersing and absorbing magnetodielectric media, including left-handed material having negative real part of the refractive index. The theory is applied to the spontaneous decay of a two-level atom at the center of a spherical free-space cavity surrounded by magnetodielectric matter of overlapping band-gap zones. Results for both big and small cavities are presented, and the problem of local-field corrections within the real-cavity model is addressed.
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