CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Second harmonic generation of metal nanoparticles under tightly focused illumination |
Jing-Wei Sun(孙经纬)1, Xiang-Hui Wang(王湘晖)1, Sheng-Jiang Chang(常胜江)1,Ming Zeng(曾明)2, Na Zhang(张娜)1 |
1. Institute of Modern Optics, Optical Information Science and Technology Key Laboratory of the Ministry of Education, Nankai University, Tianjin 300071, China; 2. School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China |
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Abstract 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.
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Received: 21 September 2015
Revised: 10 October 2015
Accepted manuscript online:
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PACS:
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78.67.Bf
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(Nanocrystals, nanoparticles, and nanoclusters)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.25.Dd
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(Wave propagation in random media)
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78.68.+m
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(Optical properties of surfaces)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61378005). |
Corresponding Authors:
Xiang-Hui Wang
E-mail: wangxianghui@nankai.edu.cn
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Cite this article:
Jing-Wei Sun(孙经纬), Xiang-Hui Wang(王湘晖), Sheng-Jiang Chang(常胜江),Ming Zeng(曾明), Na Zhang(张娜) Second harmonic generation of metal nanoparticles under tightly focused illumination 2016 Chin. Phys. B 25 037803
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