Transparency Near a Photonic Band Edge
E. Paspalakis, N. J. Kylstra, P. L. Knight
Abstract
We study the absorption and dispersion properties of a Λ-type atom which decays spontaneously near the edge of a photonic band gap (PBG). Using an isotropic PBG model, we show that the atom can become transparent to a probe laser field, even when other dissipative channels are present. This transparency originates from the square root singularity of the density of modes of the PBG material at threshold.
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