Abstract
We report on an anomalous plasmon hybridization in side-by-side coupled metallic nanoantennas on top of a silicon waveguide. Contrary to the conventional perception based on Coulomb coupling, the hybridized anti-symmetric mode in our structure possesses a higher resonance frequency than the symmetric mode. This unusual phenomenon reveals a new mechanism of plasmon hybridization, namely, coupling-induced charge redistribution. Our work includes numerical simulation, experimental validation, and theoretical analysis, emphasizing the importance of dielectric interfaces in coupled plasmonic structures, and offers new possibilities for non-Hermitian systems and integrated devices.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Yoav Chachamovitz and Guy Bartal
Opt. Lett. 45(17) 4871-4874 (2020)
Runlin Miao, Zhiwen Shu, Yuze Hu, Yuxiang Tang, Hao Hao, Jie You, Xin Zheng, Xiang’ai Cheng, Huigao Duan, and Tian Jiang
Opt. Lett. 44(13) 3198-3201 (2019)
Yingce Wang, Hua Zhao, Dewang Huo, Hang Su, Chao Wang, and Jingwen Zhang
Opt. Lett. 44(4) 947-950 (2019)