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arXiv 1708.04893cond-mat.mes-hall
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量子点中扭曲光诱导的磁光跃迁

Magnetic-optical transitions induced by twisted light in quantum dots

G. F. Quinteiro, D. E. Reiter, T. Kuhn

摘要:

理论上已经预测,携带轨道角动量的光,或扭曲光,可以被调谐为在光学频率处具有强磁场分量。在这里,我们考虑这些特殊的领域与半导体量子点的相互作用,并表明磁相互作用的结果在新的类型的光学跃迁。特别地,这种扭曲光的单个脉冲可以驱动光孔到导带的跃迁,这是使用常规高斯光束或甚至具有主导电场的扭曲光难以产生的。

英文摘要:

It has been theoretically predicted that light carrying orbital angular momentum, or twisted light, can be tuned to have a strong magnetic-field component at optical frequencies. We here consider the interaction of these peculiar fields with a semiconductor quantum dot and show that the magnetic interaction results in new types of optical transitions. In particular, a single pulse of such twisted light can drive light-hole-to-conduction band transitions that are cumbersome to produce using conventional Gaussian beams or even twisted light with dominant electric fields.

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