Frequency-dependent nonlinear optical properties of CdSe clusters

被引：32
|
作者：
Sen, Sabyasachi [1 ]
Chakrabarti, Swapan [1 ]
机构：
[1] Univ Calcutta, Dept Chem, Kolkata 700009, W Bengal, India
来源：
PHYSICAL REVIEW B | 2006年 / 74卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.74.205435
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nonlinear optical properties of CdSe clusters have been investigated using time dependent density functional theory. Finite and negative values of static and frequency dependent first order hyperpolarizability have been observed in case of CdSe and Cd3Se3 while the same is absent in Cd2Se2 and Cd4Se4. At specific frequencies, sudden increase in the frequency dependent components of first order hyperpolarizability tensor (second harmonic generation) has been attributed to the near resonance of the input energy. Three components of second order hyperpolarizability tensor have been calculated by combining analytical and finite difference techniques. The results indicate that these clusters have a high degree of nonlinear optical properties.
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页数：6
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