Gain-modulated plasmonic Rabi oscillations of coupled nanocomplex-武汉大学高等研究院

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Gain-modulated plasmonic Rabi oscillations of coupled nanocomplex

时间：2018-05-31 17:22:06点击量：

Yang, DJ (Yang, Da-Jie)^{[ 1,2 ]}; Pan, GM (Pan, Gui-Ming)^{[ 2 ]}; Ding, SJ (Ding, Si-Jing)^{[ 2 ]}; Hao, ZH (Hao, Zhong-Hua)^{[ 2 ]}; Zhou, L (Zhou, Li)^{[ 2 ]}; Wang, QQ (Wang, Qu-Quan)^{[ 1,2 ]}

OPTICAL MATERIALS

卷: 73

页: 358-363

DOI: 10.1016/j.optmat.2017.08.035

出版年: NOV 2017

文献类型:Article

摘要

Strong coupling in nanostructures can bring intriguing optical phenomena such as ultrafast Rabi oscillation-periodical energy exchange phenomenon between two modes. Rabi splitting appears in the frequency-domain spectra for strong coupling system. However, in metallic nanosystems the time domain Rabi oscillations are hard to be observed because the plasmon lifetime is limited by the heavy ohmic losses. Here we report a theoretical investigation of surface plasmon coupling behaviour of two gold nanorods with one being a core-shell rod filled with a gain material and find the periodic energy exchange phenomenon which recalls the concept of Rabi oscillation. The gain material-cored gold-shell structure dipolar mode hybridizes with the solid gold rod quadrupolar mode to form the Fano resonances. Energy exchange between the two rods happens through the near field coupling. Two approaches, to prolong plasmon lifetime by increasing the gain efficiency and to increase Rabi oscillation frequency by increasing the coupling strength, are suggested to increase the Rabi oscillation cycles. Our results offer a way to achieve unique control of light at the nanoscale and further to explore plasmonic Rabi oscillation phenomena in plasmonic nanosystems. (C) 2017 Elsevier B.V. All rights reserved.

关键词

作者关键词:Surface plasmon resonance; Fano resonances; Rabi oscillations; Gain materials; Strong couplings

KeyWords Plus:LOCALIZED SURFACE-PLASMON; FANO RESONANCE; GOLD NANORODS; 2ND-HARMONIC GENERATION; SILVER NANOPARTICLES; METAL NANOSTRUCTURES; ENERGY-TRANSFER; SHAPE; METAMATERIALS; ENHANCEMENT

作者信息

通讯作者地址: Zhou, L; Wang, QQ (通讯作者)

Wuhan Univ, Sch Phys & Technol, Dept Phys, Wuhan 430072, Hubei, Peoples R China.

地址:

[ 1 ] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China

[ 2 ] Wuhan Univ, Sch Phys & Technol, Dept Phys, Wuhan 430072, Hubei, Peoples R China

电子邮件地址:zhouli@whu.edu.cn; qqwang@whu.edu.cn

原文PDF链接：

https://linkinghub.elsevier.com/retrieve/pii/S092534671730544X

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