We theoretically investigate the optical properties of a hybrid nanostructure consisting of one triangle and one nanorod. A plasmon-induced transparency (PIT) resonance appears in the transmission spectrum, which is ascribed to the induced multipole plasmon mode of the nanorod. Multispectral PIT resonances are observed, when two or more nanorods are put in proximity to the triangle. It is proved that the combined effects of the induced multipole plasmon mode of nanorods and the cavity resonant mode contribute to these PIT peaks. The tunability of PIT on the geometrical parameters is also presented.
© 2013 Optical Society of America
Diffraction and Gratings
Original Manuscript: December 7, 2012
Revised Manuscript: February 14, 2013
Manuscript Accepted: February 15, 2013
Published: March 14, 2013
Hailong Liu, Bing Li, Longjiang Zheng, Chenxi Xu, Guangbiao Zhang, Xijun Wu, and Ning Xiang, "Multispectral plasmon-induced transparency in triangle and nanorod(s) hybrid nanostructures," Opt. Lett. 38, 977-979 (2013)