Transparency and Strong Gain Without Population Inversion in Photonic Bandgap Crystals |
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作者姓名: | 杜春光 胡正峰 |
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作者单位: | DepartmentofPhysics,TsinghuaUniversity,Beijing100084 |
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摘 要: | 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.
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关 键 词: | 晶体 光带隙晶体 无粒子数反转 透明度 |
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