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期刊论文

Origins of optical anisotropy in artificial atoms

盛卫东Weidong Shenga

APPLIED PHYSICS LETTERS 89, 173129 2006 ,-0001,():

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摘要/描述

The author report on a theoretical study of optical anisotropy in quantum dots. The mechanisms how shape anisotropy and strain field lead to optical anisotropy are identified by an empirical tight-binding approach. The anisotropic structure of quantum dots is shown to impose stronger confinement for the localized p orbitals aligning along the short axis. In self-assembled quantum dots, these orbitals are also seen in a higher potential produced by the strain field. As a result, the valence-band electrons prefer to occupy the orbitals aligning along the long axis, which leads to stronger optical emission polarized along that direction. © 2006 American Institute of Physics. _DOI: 10.1063/1.2370871-Opti

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版权说明:以下全部内容由盛卫东上传于   2010年01月30日 18时12分58秒,版权归本人所有。

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