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左手性材料对V形三能级原子光谱的影响
Influence of left-handed materials on the spontaneous emission spectrum of V-type three-level atom
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摘要: 本文研究了左手性材料板附近V形三能级原子的动力学演化及辐射光谱特性.主要考虑了从两上能级向下能级跃迁的电偶极矩相互垂直的情形,探讨了原子初始状态对辐射光谱的影响.研究结果表明,左手材料的反聚焦和相位补偿效应所引发的间接量子干涉,导致两上能级的原子布居数相互影响,原子在上能级的寿命明显增长或缩短.并造成了谱线变窄或展宽.Abstract: In this paper,the dynamic properties and the spontaneous emission spectrum of V-type three-level atom near left-handed material slab are investigated.The two orthogonal dipoles of the decay from the two upper levels to the lower level are considered.Due to the focusing and the phase compensation effects of the left-handed materials,the indirect quantum interference between two orthogonal spontaneous emission transitions leads to the fact that the populations in the two upper levels influence each other,the decay rate is enhanced or decreased and the spontaneous emission spectrum is narrowed or widened,depending on the initial atomic state.
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