Chinese Optics Letters, 2020, 18 (1): 011901, Published Online: Dec. 12, 2019  

Wavelength-dependent nonlinear absorption of gold nanocages Download: 746次

Author Affiliations
1 College of Electronic Engineering, Heilongjiang University, Harbin 150080, China
2 Physics Group, Chaoyang Medical School, Chaoyang 122000, China
3 College of Physics, Harbin Institute of Technology, Harbin 150001, China
Abstract
The dipole resonances of gold nanocages were investigated theoretically using finite difference time domain method. The results show that field enhancement is obtained at the walls of the gold nanocages. It is believed that the effect can cause a strong optical nonlinear property. To test the hypothesis, nonlinear absorption was investigated using a broadband 5 ns Z scan. It was found that at low intensities the sample shows saturable absorption (SA), while at higher intensities a switch from SA to reverse SA occurs. Moreover, the nonlinear absorption of the sample is sensitively wavelength-dependent, and, in the resonant region, saturation intensity is the largest.

Shuang Chen, Suying Yang, Yan Huang, Weiyan Jiao, Guanghua Fan, Yachen Gao. Wavelength-dependent nonlinear absorption of gold nanocages[J]. Chinese Optics Letters, 2020, 18(1): 011901.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!