汪国平教授团队研究成果在《Applied Physics Letters》发表
来源：深圳大学电子科学与技术学院 浏览：469 时间：2016-07-25
Trimeric metasurfaces for independent control of bright and dark modes of Fano resonances
Zi-Lan Deng, Tao Fu, Zhengbiao Ouyang and Guo Ping Wang
In this paper, we present a simple trimeric metasurface consisting of three dipolar resonators in each unit cell, to achieve the independent controlling over both the broad bright mode and the sharp dark mode of Fano resonances. Through both the finite difference time domain simulation and microwaveexperiment, we find that spectral positions of the bright and dark modes are linearly dependent on, respectively, the global spacing between adjacent unit cells and the local spacing between adjacent dipoles within each unit cell. The dependence of the spectral position of bright (dark) mode on the global (local) spacing is independent without mutual influence, which provides a facile pathway to control the Fano resonance with large flexibility. Our proposed scheme to control Fano resonance is highly desired in various fields including lasing spaser and biosensing with improved performance.
Published in: Applied Physics Letters, 2016, 108(8):139-8034