Liu Jietao, Zhao Xiaoliang, Gong Rui, Wu Tengfei, Gong Changmei, Shao Xiaopeng
Opt Express. 2015 Oct 19;23(21):27343-53. doi: 10.1364/OE.23.027343.
We analyze the design of near infrared all-optical controllable and dynamically tunable multispectral Fano resonances based on subgroup decomposition of plasmonic resonances in hybrid nanoslits antenna plasmonic system. The theoretical investigation complemented with numerical simulations show that the Fano resonance lines shape can be tailored efficiently and continuously with the nanoslits geometry and the variation of the polarization states of the incident light. The subgroup decomposition of the spectral profile and the modification of plasmonic resonances lineshape that leads to the Fano-type profile of transmission is investigated and revealed. The separate contribution from individual spectral of single-slit array subgroup is attributed to the resulting overall multispectral Fano lineshape of the proposed T-shaped slits array at their corresponding spectral peaks zone. The polarization-selective tunability of the multispectral Fano resonances in the planar hybrid plasmonic system creates new avenues for designing multi-channel multi-wavelength tunable Fano effect.
我们基于混合纳米狭缝天线等离子体系统中等离子体共振的子群分解，分析了近红外全光可控且动态可调谐的多光谱法诺共振的设计。理论研究与数值模拟相结合表明，法诺共振线的形状可以通过纳米狭缝的几何形状以及入射光偏振态的变化进行有效且连续的调整。研究并揭示了光谱分布的子群分解以及导致法诺型透射谱的等离子体共振线形的改变。单缝阵列子群各光谱的单独贡献归因于所提出的T形狭缝阵列在其相应光谱峰值区域产生的整体多光谱法诺线形。平面混合等离子体系统中多光谱法诺共振的偏振选择性可调性为设计多通道多波长可调法诺效应开辟了新途径。
