Gain-modulated plasmonic Rabi oscillations of coupled nanocomplex
Gain-modulated plasmonic Rabi oscillations of coupled nanocomplex
复制标题
耦合纳米复合物的增益调制等离子体拉比振荡
DOI：
10.1016/j.optmat.2017.08.035
复制
发表时间：
2017-11
影响因子：
3.9
通讯作者：
Wang Qu-Quan
中科院分区：
文献类型：
--
作者：
Yang Da-Jie;Pan Gui-Ming;Ding Si-Jing;Hao Zhong-Hua;Zhou Li;Wang Qu-Quan
纳米结构中的强耦合可以产生超快拉比振荡-两种模式之间的周期性能量交换现象等有趣的光学现象。强耦合系统的频域谱中存在拉比分裂现象。然而，在金属纳米系统中，由于等离子体寿命受到严重欧姆损失的限制，很难观察到时域拉比振荡。本文报道了两个金纳米棒（其中一个是填充增益材料的核壳棒）表面等离子体激元耦合行为的理论研究，并发现了与拉比振荡概念相似的周期性能量交换现象。增益材料芯金壳结构偶极模式与固体金棒四极模式杂化形成法诺共振。两杆之间的能量交换是通过近场耦合进行的。提出了通过提高增益效率延长等离子体寿命和通过增加耦合强度提高拉比振荡频率来增加拉比振荡周期的两种方法。我们的研究结果提供了一种在纳米尺度上实现独特的光控制的方法，并进一步探索等离子体纳米系统中的等离子体拉比振荡现象。
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.
登录
查看更多内容
影响因子：
3.4
作者：
K. Nerkararyan;S. Bozhevolnyi
通讯作者：
K. Nerkararyan;S. Bozhevolnyi
影响因子：
8.6
作者：
S. Yoshino;G. Oohata;K. Mizoguchi
通讯作者：
S. Yoshino;G. Oohata;K. Mizoguchi
影响因子：
10.8
作者：
Mukherjee, Shaunak;Sobhani, Heidar;Halas, Naomi J.
通讯作者：
Halas, Naomi J.
影响因子：
7
作者：
Tingting Yin;Zhaogang Dong;Liyong Jiang;Lei Zhang;Hailong Hu;C. Qiu;Joel K. W. Yang;Zexiang Shen
通讯作者：
Tingting Yin;Zhaogang Dong;Liyong Jiang;Lei Zhang;Hailong Hu;C. Qiu;Joel K. W. Yang;Zexiang Shen
影响因子：
56.9
作者：
Prodan, E;Radloff, C;Nordlander, P
通讯作者：
Nordlander, P