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
Optics Express, 30(3), 3443 (2022)
DOI: 10.1364/OE.449968
Abstract
Controlling the line shape of Fano resonance has continued to attract significant research attention in recent years owing to its practical applications such as lasing, biosensing, and slow-light devices. However, controllable Fano resonances always require stringent alignment of complex symmetry-breaking structures; therefore, the manipulation can only be performed with limited degrees of freedom and a narrow tuning range. This work demonstrates dark-mode excitation tuning independent of the bright mode for the first time, to the authors’ knowledge, in asymmetric Fano me