Second harmonic generation of metal nanoparticles under tightly focused illumination

The near-field and far-field second harmonic （SH） responses of a metal spherical nanoparticle placed in the focal region of a highly focused beam are investigated by using the calculation model based on three-dimensional finite-difference time-domain （FDTD） method. The results show that off-axis bac...

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Bibliographic Details
Published in:Chinese physics B 2016-03, Vol.25 (3), p.403-407
Main Author: 孙经纬 王湘晖 常胜江 曾明 张娜
Format: Article
Language:English
Subjects:
FDTD
Finite difference method
Focusing
Illumination
Ion beams
Mathematical analysis
Nanoparticles
Second harmonic generation
Three dimensional models
二次谐波
光照条件
反向传播
时域有限差分
纳米颗粒
计算模型
金属纳米粒子
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Summary:The near-field and far-field second harmonic （SH） responses of a metal spherical nanoparticle placed in the focal region of a highly focused beam are investigated by using the calculation model based on three-dimensional finite-difference time-domain （FDTD） method. The results show that off-axis backward-propagating SH response can be reinforced by tightly focusing, due to the increase of the relative magnitude of the longitudinal field component and the phase shift along the propagation direction.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/3/037803