| 量子点量子阱结构中激子的极化效应(英文) |
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| 引用本文： | 赵梅兰,邢雁,王志平.量子点量子阱结构中激子的极化效应(英文)[J].内蒙古大学学报(自然科学版),2012,43(3):251-257. |
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| 作者姓名： | 赵梅兰 邢雁 王志平 |
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| 作者单位： | 1. 内蒙古大学物理科学与技术学院,呼和浩特,010021
2. 内蒙古大学物理科学与技术学院,呼和浩特010021;内蒙古自治区高等学校半导体光伏技术重点实验室,呼和浩特010021 |
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| 基金项目： | 国家自然科学基金资助项目，内蒙古自然科学基金资助项目 |
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| 摘 要： | 考虑激子与体纵光学声子的相互作用,采用变分法研究了量子点量子阱结构中澈子的极化效应.以CdS/HgS量子点量子阱结构为例进行数值计算,得到了激子的基态能量和束缚能.研究结果表明,声子对澈子束缚能的贡献随着阱宽的增加而增加,极化子效应不能忽略.激子的基态能量和束缚能明显依赖于量子点量子阱结构的核半径和壳层厚度,量子点量子阱结构的尺寸对激子-声子相互作用有重要的影响.
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| 关 键 词： | 极化效应 激子 量子点 量子阱 |
Polaron Effects on Excitons in a Quantum Dot Quantum Well Structure |
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| ZHAO Mei-lan
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XING Yan
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WANG Zhi-ping.Polaron Effects on Excitons in a Quantum Dot Quantum Well Structure[J].Acta Scientiarum Naturalium Universitatis Neimongol,2012,43(3):251-257. |
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| Authors: | ZHAO Mei-lan XING Yan WANG Zhi-ping |
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| Institution: | 1,2(1.School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China;2.Key Laboratory of Semiconductor Photovoltaic Technology of Inner Mongolia Autonomous Region,Hohhot 010021,China) |
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| Abstract: | The polaronic effect on the exciton in a spherical quantum dot quantum well(QDQW) structure is studied theoretically by using a variational approach.The interactions of an exciton with the longitudinal optical phonons are taken into account in the framework of the dielectric continuum approximation.The calculations are carried out for a CdS / HgS quantum dot quantum well structure.It is shown that the contribution of the phonons to the binding energy increases when the well width increases and the polaron effects are un-negligible.Both the ground state energy and the binding energy of exciton depends sensitively on the core radius and shell thickness of the QDQW structure. |
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| Keywords: | polaron effect exciton quantum dot quantum well |
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