Susceptibility of a two-level atom near an isotropic photonic band edge: transparency and band edge profile reconstruction

摘要

We discuss the necessary conditions for a two-level system in the presence ofan isotropic band edge to be transparent to a probe laser field. The two-levelatom is transparent whenever it is coupled to a reservoir constituted of twoparts - a flat and a non-flat density of modes representing a PBG structure. Aproposal on the reconstruction of the band edge profile from the experimentallymeasured susceptibility is also presented.