量子棒中杂质极化子的内部激发态

J4 ›› 2012, Vol. 29 ›› Issue (3): 368-373.

量子棒中杂质极化子的内部激发态

白旭芳¹,王东民²,肖景林¹

1 内蒙古民族大学物理与电子信息学院，内蒙古通辽 028043;
2 河南商丘师范学院物理系，河南商丘 476000

出版日期:2012-05-28 发布日期:2012-05-22
通讯作者: 白旭芳 (1963-),女，内蒙古通辽人，副教授，主要从事凝聚态物理的研究。 E-mail:xufang1234@126.com
基金资助:
国家自然科学基金资助项目（10347004；10747002）

Internal excited state of impurity polaron in quantum rods

BAI Xu-fang¹ ，WANG Dong-min² ，XIAO Jing-lin¹

1 College of Physics and Electronic Information , Inner Mongolia National University , Tongliao 028043 ,China ;
2 Department of Physics ,Henan Shangqiu Teachers College, Shangqiu 476000, China

Published:2012-05-28 Online:2012-05-22

摘要/Abstract

摘要：

通过坐标变换把量子棒的哈密顿量由椭球边界变为球形边界.采用线性组合算符和么正变换方法研究了量子棒中弱耦合杂质极化子的第一内部激发态能量、激发能量和从第一内部激发态到基态跃迁频率随量子棒的横向和纵向有效受限长度、库仑束缚势、椭球的纵横比的变化关系.结果表明:它们随库仑束缚势的增加而增大,随纵横比和有效受限长度的增加而减少.表现出量子棒珍奇的量子尺寸限制效应.

关键词: 光电子学, 量子棒, 线性组合算符, 杂质极化子, 纵横比

Abstract:

The Hamiltonian of a quantum rod with an ellipsoidal boundary is given after a coordinate transformation , which changes the ellipsoidal boundary into a spherical one . We then study the first excited state energy , the excitation energy and the transition frequency between the first excited state and the ground state of the weak-coupled impurity polaron in it . The effects of the transverse and longitudinal effective confinement lengths , the Coulomb bound potential and the ellipsoid aspect ratio are taken into consideration by using linear combination operator and unitary transformation methods . It is found that these quantities are increasing functions of the Coulomb bound potential ,whereas are decreasing functions of the aspect ratio and the effective confinement lengths . These can be attributed to the interesting quantum size confining effect .

Key words: optoelectroics, quantum rods, impurity polaron, linear combination operator , aspect ratio

中图分类号:

O461

白旭芳,王东民,肖景林. 量子棒中杂质极化子的内部激发态[J]. J4, 2012, 29(3): 368-373.

BAI Xu-fang，WANG Dong-min，XIAO Jing-lin. Internal excited state of impurity polaron in quantum rods[J]. J4, 2012, 29(3): 368-373.

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