[1]刘明强,郭震宁,杨小儒.nc-Si/SiO2球形量子点的三阶极化率[J].华侨大学学报(自然科学版),2009,30(2):143-146.[doi:10.11830/ISSN.1000-5013.2009.02.0143]
　LIU Ming-qiang,GUO Zhen-ning,YANG Xiao-ru.Third-order Nonlinear Susceptibility in a nc-Si/SiO2 Spherical Quantum Dot[J].Journal of Huaqiao University(Natural Science),2009,30(2):143-146.[doi:10.11830/ISSN.1000-5013.2009.02.0143]
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nc-Si/SiO2球形量子点的三阶极化率()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第30卷
期数:
2009年第2期
页码:
143-146
栏目:
出版日期:
2009-03-20

文章信息/Info

Title:
Third-order Nonlinear Susceptibility in a nc-Si/SiO2 Spherical Quantum Dot
文章编号:
1000-5013(2009)02-0143-04
作者:
刘明强; 郭震宁; 杨小儒
华侨大学信息科学与工程学院
Author(s):
LIU Ming-qiang;  GUO Zhen-ning;  YANG Xiao-ru
College of Information Science and Engineering, Huaqiao University, Quanzhou 362021, China
关键词:
量子点;  无限深势阱;  三阶极化率;  nc-Si/SiO2
Keywords:
quantum dot;  infinite barrier;  third-order susceptibilities;  nc-Si/SiO2
分类号:
O471.1
DOI:
10.11830/ISSN.1000-5013.2009.02.0143
文献标志码:
A
摘要:
在有效质量近似下,采用无限深势阱,理论计算nc-Si/SiO2球形量子点导带中的电子束缚态,并利用紧束缚密度矩阵理论,推导出共振三阶极化率的表达式.通过数值模拟,分析讨论nc-Si/SiO2球形量子点的三阶极化率与量子点半径、入射光子的能量和弛豫相的关系.结果表明,在强受限中,三阶极化率与量子点半径、入射光子能量和弛豫相有着显著的关系.随着量子点半径的增大、入射光子能量的增大和弛豫相的减小,三阶极化率都有不同程度的增强.
Abstract:
Under the effective mass approximation,the electron state is considered to be confined within a nc-Si/SiO2 spherical quantum dot with infinite barrier,and by using the compact density matrix method,the analytic expression for the resonant third-order susceptibilities was derived.According to numerical simulation,the relation of the third-order susceptibilities with quantum dot dimension,incident photo energy and various relaxation rate was discussed.The result shows that the third-order susceptibilities strongly depends on quantum dot dimensions,incident photon energy and various relaxation rate.The third-order susceptibilities increases with an increase in quantum dot dimension and incident photo energy and a decrease in various relaxation rate.

参考文献/References:

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备注/Memo

备注/Memo:
福建省自然科学基金资助项目(E0410018); 国务院侨办科研基金资助项目(06QZR02); 泉州市科技计划重点项目(2008G7)
更新日期/Last Update: 2014-03-23