Muhammad Naseer, Khan Adnan Daud, Deng Zi-Lan, Khan Karim, Yadav Ashish, Liu Qiang, Ouyang Zhengbiao
THz Technical Research Center of Shenzhen University, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Shenzhen 518060, China.
Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen 518060, China.
Nanomaterials (Basel). 2017 Nov 19;7(11):397. doi: 10.3390/nano7110397.
We report spectral splitting behaviors based on Fano resonances in a novel simple planar metasurface composed of gold nanobars and nanorings. Multiple plasmonic modes and sharp Fano effects are achieved in a broadband transmittance spectrum by exploiting the rotational symmetry of the metasurface. The transmission properties are effectively modified and tuned by modulating the structural parameters. The highest single side -factor and FoM which reaches 196 and 105 are observed at Fano resonances. Our proposed design is relatively simple and can be applied for various applications such as multi-wavelength highly sensitive plasmonic sensors, switching, and slow light devices.
我们报道了在一种由金纳米棒和纳米环组成的新型简单平面超表面中基于法诺共振的光谱分裂行为。通过利用超表面的旋转对称性，在宽带透射光谱中实现了多个等离子体模式和尖锐的法诺效应。通过调制结构参数有效地修改和调整了传输特性。在法诺共振处观察到最高单边因子和品质因数分别达到196和105。我们提出的设计相对简单，可应用于多种应用，如多波长高灵敏度等离子体传感器、开关和慢光器件。
