中国物理B ›› 2002, Vol. 11 ›› Issue (12): 1286-1293.doi: 10.1088/1009-1963/11/12/313

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Excitons in quantum-dot quantum-well nanoparticles

史俊杰   

  1. State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2002-06-12 出版日期:2005-06-12 发布日期:2005-06-12

Excitons in quantum-dot quantum-well nanoparticles

Shi Jun-Jie (史俊杰)   

  1. State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871, China
  • Received:2002-06-12 Online:2005-06-12 Published:2005-06-12

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摘要： A variational calculation is presented for the ground-state properties of excitons confined in spherical core-shell quantum-dot quantum-well (QDQW) nanoparticles. The relationship between the exciton states and structure parameters of QDQW nanoparticles is investigated, in which both the heavy-hole and the light-hole exciton states are considered. The results show that the confinement energies of the electron and hole states and the exciton binding energies depend sensitively on the well width and core radius of the QDQW structure. A detailed comparison between the heavy-hole and light-hole exciton states is given. Excellent agreement is found between experimental results and our calculated 1se－1sh transition energies.

Abstract: A variational calculation is presented for the ground-state properties of excitons confined in spherical core-shell quantum-dot quantum-well (QDQW) nanoparticles. The relationship between the exciton states and structure parameters of QDQW nanoparticles is investigated, in which both the heavy-hole and the light-hole exciton states are considered. The results show that the confinement energies of the electron and hole states and the exciton binding energies depend sensitively on the well width and core radius of the QDQW structure. A detailed comparison between the heavy-hole and light-hole exciton states is given. Excellent agreement is found between experimental results and our calculated 1se－1sh transition energies.

Key words: excitons, quantum-dot quantum-well, nanoparticle

中图分类号:  (Quantum dots)

  • 73.21.La
73.21.Fg (Quantum wells) 73.22.Lp (Collective excitations)