Tunable intrinsic optical bistability of Au-Ag alloy nanoparticle: effects of spatial position and Au composition

被引：3
|
作者：
Liu, H. [1 ,2 ]
Huang, L. -Q. [1 ]
Zhu, J. [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Sci, Nonequilibrium Condensed Matter & Quantum Engn La, Lab Minist Educ, Xian 710049, Peoples R China
[2] Air Force Engn Univ, Telecommun Engn Inst, Xian 710077, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL B | 2010年 / 77卷 / 01期
关键词：
PARTICLES; MEDIA;
D O I：
10.1140/epjb/e2010-00245-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The intrinsic optical bistability (IOB) of an Au-Ag alloy nanosphere is theoretically investigated. Calculation results based on quasi-static theory and Kerr nonlinearity show that the optical bistable behavior for both spatial average response and local field at the hot location only exists when the local electric field is enhanced and exceed the threshold intensity, which is dependent on the spatial position and gold composition. Our theoretic investigation also presents a physical picture of how the local field enhancement affects the IOB characters of the alloy nanoparticles.
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页码：133 / 137
页数：5
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