Characteristics and mechanism analysis of Fano resonances in <inline-formula> <img src="cpb_26_12_127301_ieqn001.gif"/> </inline-formula>-shaped gold nano-trimer

Characteristics and mechanism analysis of Fano resonances in

-shaped gold nano-trimer

Zhong Han-Hua¹, Zhou Jian-Hong², Gu Chen-Jie¹, Wang Mian¹, Fang Yun-Tuan³, Xu Tian⁴, Zhou Jun^{1, †}

(color online) (a) Normalized extinction spectra (black line) of the Π-shaped nano-trimer and the Fano interference model fitted (red dot line), (b) extinction spectra and the and charge distributions of two nanorice, (c) extinction spectra and the and charge distributions of the nanorod, which is excited by point dipoles (marked with blue point in the inset), and (d) and charge distributions of the Π-shaped nano-trimer at Fano peaks and dips.