Fanolike resonance due to plasmon excitation in linear chains of metal bumps.
Fanolike resonance due to plasmon excitation in linear chains of metal bumps.
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DOI：
10.1364/oe.19.010485
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发表时间：
2011-05
期刊：
影响因子：
3.8
通讯作者：
Xiao-gang Yin;Cheng-ping Huang;Qian-jin Wang;Wan-xia Huang;Lin Zhou;Chao Zhang-;Yong‐yuan Zhu
中科院分区：
文献类型：
--
作者：
Xiao-gang Yin;Cheng-ping Huang;Qian-jin Wang;Wan-xia Huang;Lin Zhou;Chao Zhang-;Yong‐yuan Zhu
我们报道了一种改进的狭缝光栅中的透射异常现象，这种光栅在狭缝侧壁上用金属凸点的线性链来修饰。一个不对称的线型，这是法诺共振的特点，已被发现在一个狭窄的频率范围内的频谱。这种效应可以归因于线性链中非共振背景传输和共振等离子体波激发之间的干涉。链等离子体激元模式的色散已被提出，使法诺效应的光谱位置的动态调谐。
We report the transmission anomaly in a modified slit grating, which is dressed, on the slit sidewalls, with the linear chains of metal bumps. An asymmetric lineshape, which is characteristic of the Fano resonance, has been found in a narrow frequency range of the spectrum. The effect can be attributed to the interference between nonresonant background transmission and resonant plasmonic wave excitation in the linear chains. The dispersion of chain plasmon mode has been suggested, enabling the dynamic tuning of spectral position of the Fano effect.