ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Multipole resonance in the interaction of a spherical Ag nanoparticle with an emitting dipole |
Liu Jia-Dong (刘加东)a b, Song Feng (宋峰)a b, Zhang Jun (张俊)b, Liu Shu-Jing (刘淑静)c, Wang Feng-Xiao (王凤箫)b, Wang Li-Chao (王立超)b |
a TEDA Applied Physics School, Nankai University, Tianjin 300457, China; b School of Physics, Nankai University, Tianjin 300071, China; c School of Biomedical Engineering, Tianjin Medical University, Tianjin 300070, China |
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Abstract The effect of multipole resonance in the interaction between a spherical metallic nanoparticle (MNP) and an emitting dipole is studied with the Mie theory. The results show that the absorption peak of the MNP with respect to the field of the emitting dipole is blue-shifted with the decrease of the spacing between MNP and emitting dipole due to the enhanced multipole resonance. At a short distance, the enhanced multipole terms of scattering are not obvious compared with the dipole term. For the decay rate of the emitting dipole, multipole resonance brings about the enhancement of it largely at short spacing. For the radiative decay rate, the behavior is quite different. The dipole term is dominant at a short spacing, and the multipole term is dominant at a larger spacing.
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Received: 21 February 2014
Revised: 02 April 2014
Accepted manuscript online:
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PACS:
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42.25.Fx
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(Diffraction and scattering)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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52.25.Tx
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(Emission, absorption, and scattering of particles)
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78.20.Bh
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(Theory, models, and numerical simulation)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61138004 and 61107068) and the National Basic Research Program of China (Grant No. 2012CB921904). |
Corresponding Authors:
Song Feng
E-mail: fsong@nankai.edu.cn
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Cite this article:
Liu Jia-Dong (刘加东), Song Feng (宋峰), Zhang Jun (张俊), Liu Shu-Jing (刘淑静), Wang Feng-Xiao (王凤箫), Wang Li-Chao (王立超) Multipole resonance in the interaction of a spherical Ag nanoparticle with an emitting dipole 2014 Chin. Phys. B 23 084206
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