科研之友
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摘要
It is shown that the optical absorption spectra of submicrometer-size semiconductor quantum rings strongly change with the incidence angle of the exciting light. Besides the usual direct optical transitions, additional indirect transitions occur for fields with the wave-vector components perpendicular to the symmetry axis of the ring. These indirect transitions are a consequence of the various orbital angular momentum modes of light that become accessible when appropriate quantum rings are used.
- 出版日期2011-10-12
