Abstract

Characteristics of Fano resonances in metallic arrays of asymmetric dual stripes are theoretically investigated. The structure consists of two perfect metal stripes with unequal sizes in a unit cell. In addition to the total reflection that usually occurs in single-stripe arrays, the dual-stripe arrays exhibit two extra pairs of reflection peaks and dips, which are identified as the Fano resonance with the reflection line shape characterized by a Fano formula. In particular, the peak–dip pair on the high-frequency side is recognized as the high-order Fano resonance, as compared to its counterpart on the low-frequency side. Features of the Fano resonances are further illustrated with the electric field and surface current patterns at the corresponding frequencies. The underlying mechanism of multiple Fano resonances in the dual-stripe arrays is also discussed.

© 2010 Optical Society of America

Electrically tunable Fano-type resonance of an asymmetric metal wire pair

Quanhong Fu, Fuli Zhang, Yuancheng Fan, Xuan He, Tong Qiao, and Botao Kong
Opt. Express 24(11) 11708-11715 (2016)

Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings

Kevin Tetz, Vitaliy Lomakin, Maziar P. Nezhad, Lin Pang, and Yeshaiahu Fainman
J. Opt. Soc. Am. A 27(4) 911-917 (2010)

Asymmetrically engineered metallic nanodisk clusters for plasmonic Fano resonance generation

Truong Khang Nguyen, Truong Duy Le, Phuc Toan Dang, and Khai Q. Le
J. Opt. Soc. Am. B 34(3) 668-672 (2017)

Fano resonances in plasmonic heptamer nano-hole arrays

Akram Hajebifard and Pierre Berini
Opt. Express 25(16) 18566-18580 (2017)

Fano resonances in THz metamaterials composed of continuous metallic wires and split ring resonators

Zhaofeng Li, Semih Cakmakyapan, Bayram Butun, Christina Daskalaki, Stelios Tzortzakis, Xiaodong Yang, and Ekmel Ozbay
Opt. Express 22(22) 26572-26584 (2014)