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Transparency and Strong Gain Without Population Inversion in Photonic Bandgap Crystals

2002; Institute of Physics; Volume: 19; Issue: 3 Linguagem: Inglês

10.1088/0256-307x/19/3/316

1741-3540

Chunguang Du, Zhengfeng Hu, Hou Chun-Feng, Shiqun Li,

Quantum optics and atomic interactions

Without using the weak-field approximation, we investigate the transient properties of a Λ-type atom with one transition near resonant with a photonic bandgap edge. Whatever the initial state of the atom is, the atom can become transparent to a probe field, and strong gain without population inversion is also possible if the atom has been pre-excited. The defect mode formed by atomic doping can have a strong effect on the absorption properties of the atom.