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题名: Electronic structure and optical properties of quantum rods with wurtzite structure
作者: Li XZ;  Xia JB
发表日期: 2002
摘要: The Hamiltonian of the wurtzite quantum rods with an ellipsoidal boundary is given after a coordinate transformation. The energies, wave functions, and transition possibilities are obtained as functions of the aspect ratio e with the same method we used on spherical dots. With an overall consideration of both the transition matrix element and the Boltzmann distribution we explained why the polarization factor increases with increasing e and approaches a saturation value, which tallies quite well with the experimental result. When e increases more and more S-z states are mixed into the ground, second, and third states of J(z)=1/2, resulting in an increase of the emission of z polarization. It is just the linear terms of the momentum operator in the hole Hamiltonian that cause the mixing of S and P states in the hole ground state. The effects of the crystal field splitting energy, temperature, and transverse radius to the polarization are also considered. We also calculated the band gap variation with the size and shape of the quantum rods.
KOS主题词: Semiconductor nanocrystals;  Quantum dots;  emission;  Spheres
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Li XZ; Xia JB .Electronic structure and optical properties of quantum rods with wurtzite structure ,PHYSICAL REVIEW B,2002 ,66 (11):Art.No.115316
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