Plasmonic Effect of a Nanoshell Dimer with Different Gain Materials
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- 作者：Qiao Wang (1)
Shi Pan (1)
Yingnan Guo (1)
Rui Li (1)
Kun Liu (1) - 关键词：Nanoshell dimer ; Gain material ; Plasmonic effect ; Local energy enhancement
- 刊名：Plasmonics
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：9
- 期：6
- 页码：1463-1469
- 全文大小：780 KB
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Shi Pan (1)
Yingnan Guo (1)
Rui Li (1)
Kun Liu (1)
1. Institute of Near-field Optics and Nano-technology, School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian, 116024, China - ISSN：1557-1963
文摘
Though the plasmonic property for a passive nanoparticle dimer has been studied widely, the performance of a nanoparticle dimer with gain material is still inexplicit to our knowledge. Therefore, in this paper, we focus on the plasmonic effect of a nanoshell dimer, with its core filled with different gain materials, under a polarized plane wave excitation using a three-dimensional finite difference time domain method. It is shown that the gain materials in the core of the nanoshell can compensate the intrinsic absorption of the metal shell, resulting in a local energy enhancement in the junction of the active nanoshell dimer. The physics is supported by the detailed energy distribution of the active nanoshell dimer in each geometry region. It is found that the plasmonic coupling between two active nanoshell particles is more compact than the case of passive ones. The influence of shell thickness on the interaction between two adjacent active nanoshells is also analyzed.