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篇目详细内容 |
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【篇名】 |
Dynamical behaviors of an exciton in an asymmetric double coupled quantum dot |
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【刊名】 |
Frontiers of Physics in China |
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【刊名缩写】 |
Front. Phys. China |
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【ISSN】 |
1673-3487 |
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【EISSN】 |
1673-3606 |
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【DOI】 |
10.1007/s11467-006-0007-y |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2006 |
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【卷期】 |
1
卷2期 |
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【页码】 |
238-242
页,共
5
页 |
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【作者】 |
LIU Can-de;
LIU Wen;
LI Feng-ling;
WU Da-peng;
SU Xi-yu;
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【关键词】 |
exciton; quantum dots; localization;quasienergy; Floquet states |
【摘要】 |
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Dynamical behaviors of an exciton in an asymmetric double coupled quantum dot and an alternatingcurrent (ac) electric field have been analyzed based on the two-level approximation theory, and the conditions under which dynamical localization occurs are obtained. It shows that when the amplitude of the ac electric field is small, the Coulomb interaction plays an important role. The dynamical behaviors of the exciton are mainly confined in the low-level subspace. When the ratio of the field intensity to frequency is the root of Bessel function, electron and hole are localized in one dot, and they can be divided with the increasing amplitude of the ac electric field. |
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