Localized surface plasmon resonance properties of metal nanoparticle dimers

被引：0
作者：
Li, Zhao [1 ]
Yu, Xian-Tong [1 ]
Qin, Cui-Fang [1 ]
Cao, Xiao-Dan [1 ]
Pan, Hai-Feng [1 ]
Xu, Jian-Hua [1 ]
机构：
[1] State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai
来源：
Guangdianzi Jiguang/Journal of Optoelectronics Laser | 2015年 / 26卷 / 07期
关键词：
Dimer; Finite difference time-domain (FDTD); Localized surface plasmon resonance (LSPR); Nanoparticles; Surface plasmon amplification by stimulated emission of radiation (SPASER);
D O I：
10.16136/j.joel.2015.06.0119
中图分类号：
学科分类号：
摘要：
Strong coupling between electronic transitions and localized optical modes can yield a new kind of optical source, which is important. It would break the bottleneck of delivering light from a macroscopic external source to the nanometre scale, such as low coupling efficiency and difficulty in accessing individual optical modes. With metal nanoparticle dimer as an optical resonance cavity, we simulate a novel localized surface plasmon laser by using the finite difference time-domain (FDTD) method. Lorentz permittivity model is applied to study the properties of the gain medium of the dimer, where the interaction mechanism between the two individual nanoparticles is investigated. Furthermore, we explore the influence of localized surface plasmon resonance interaction on the enhancement of local field. The simulation results show that the dimer surface plasmon laser can enhance the local electric field significantly with a maximum of 27 times higher than the single nanoparticle surface plasmon laser for the enhancement factor Q. This research may lay foundation for the design of nano-optics, especially laser devices. ©, 2015, Board of Optronics Lasers. All right reserved.
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页码：1423 / 1428
页数：5
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