Electronic transitions in quantum dots and rings induced by inhomogeneous off-centered light beams
Electronic transitions in quantum dots and rings induced by inhomogeneous off-centered light beams
复制标题
由不均匀偏心光束引起的量子点和环中的电子跃迁
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. I. Tamborenea
中科院分区：
文献类型：
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作者：
G. Quinteiro;Aner Oscar Lucero;P. I. Tamborenea
我们从理论上研究了具有（扭曲光）和不具有（平面波光）轨道角动量的非均匀光束对基于光子晶体的纳米结构的影响，当光束和纳米结构的对称轴相互平行时。精确的分析结果是通过扩大偏心光场在适当的光模式围绕纳米结构为中心。我们演示了如何电子跃迁涉及的轨道角动量的不同数量的转移被打开和关闭的光束和系统的轴之间的分离的函数。特别是，我们表明，即使偏离中心的平面波光束诱导的过渡，使初始和最终状态的角动量是不同的。
We theoretically investigate the effect of inhomogeneous light beams with (twisted light) and without (plane-wave light) orbital angular momentum on semiconductor-based nanostructures, when the symmetry axes of the beam and the nanostructure are displaced parallel to each other. Exact analytical results are obtained by expanding the off-centered light field in terms of the appropriate light modes centered around the nanostructure. We demonstrate how electronic transitions involving the transfer of different amounts of orbital angular momentum are switched on and off as a function of the separation between the axes of the beam and the system. In particular, we show that even off-centered plane-wave beams induce transitions such that the angular momenta of the initial and final states are different.