期刊
CHINESE PHYSICS B
卷 21, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/21/4/047804
关键词
nonlinear absorption; nonlinear refraction; silver nanoparticles; electronic structures
资金
- Natural Science Foundation of Heilongjiang Province, China [A200912]
- Harbin Institute of Technology, China
- National Natural Science Foundation of China [60907023, 10904027]
Silver (Ag) nanoparticles with different average sizes are prepared, and the nonlinear absorption and refraction of these nanoparticles are investigated with femtosecond laser pulses at 800 nm. The smallest Ag nanoparticles show insignificant nonlinear absorption, whereas the larger ones show saturable absorption. By considering the previously reported positive nonlinear absorption of 9 nm Ag nanoparticles, the nonlinear absorptions of Ag nanoparticles are found to be size-dependent. All these nonlinear absorptions can be compatibly explained from the viewpoints of electronic transitions, energy bands and electronic structures in the conduction band of Ag nanoparticles. The nonlinear refraction is attributed to the effect of hot electrons arising from the intraband transition in the s-p conduction band of Ag nanoparticles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据