Abstract

The engineering of metal-insulator-metal metasurfaces (MSs) displaying sharp spectral features based on Fano-type interference between a symmetric bright mode and an antisymmetric dark mode is reported. The proposed mechanism for direct excitation of antisymmetric mode avoids the necessity of mode hybridization through near-field coupling. Modeling and experimental results bring evidence that such MSs operating in the microwave or terahertz domains provide greater flexibility for Fano resonance engineering and provide strong enhancement of the spectral selectivity factor. It is shown that the occurring Fano resonance interference is related to the broken eigenmode orthogonality in open systems and is independent of hybridization mechanism.

© 2018 Optical Society of America

Direct dark modes excitation in bi-layered enantiomeric atoms-based metasurface through symmetry matching

Elena Bochkova, Shah Nawaz Burokur, André de Lustrac, and Anatole Lupu
Opt. Lett. 41(2) 412-415 (2016)

High-quality-factor multiple Fano resonances for refractive index sensing

Yuebian Zhang, Wenwei Liu, Zhancheng Li, Zhi Li, Hua Cheng, Shuqi Chen, and Jianguo Tian
Opt. Lett. 43(8) 1842-1845 (2018)

Fano resonances in a high-Q terahertz whispering-gallery mode resonator coupled to a multi-mode waveguide

Dominik Walter Vogt and Rainer Leonhardt
Opt. Lett. 42(21) 4359-4362 (2017)

Full manipulation of transparency and absorption through direct tuning of dark modes in high-Q Fano metamaterials

Seontae Kim, Dongpyo Hong, Matlabjon Sattorov, Seonmyeong Kim, Young Joon Yoo, Sang Yoon Park, and Gun-Sik Park
Opt. Express 30(3) 3443-3454 (2022)

Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials

Wei Cao, Ranjan Singh, Ibraheem A. I Al-Naib, Mingxia He, Antoinette J. Taylor, and Weili Zhang
Opt. Lett. 37(16) 3366-3368 (2012)