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Transparency and Strong Gain Without Population Inversion in Photonic Bandgap Crystals |
| DU Chun-Guang;HU Zheng-Feng;HOU Chun-Feng;LI Shi-Qun |
| Department of Physics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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DU Chun-Guang, HU Zheng-Feng, HOU Chun-Feng et al 2002 Chin. Phys. Lett. 19 338-341 |
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Abstract 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 strong effect on the absorption properties of the atom.
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| Keywords:
42.50.Gy
42.70.Qs
03.67.-a
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Published: 01 March 2002
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| PACS: |
42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.70.Qs
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(Photonic bandgap materials)
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03.67.-a
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(Quantum information)
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