High-Q terahertz Fano resonance with extraordinary transmission in concentric ring apertures | Zendy

Jie Shu | Zendy; Weilu Gao | Zendy; Kimberly S. Reichel | Zendy; Daniel V. Nickel | Zendy; Jason Dominguez | Zendy; Igal Brener | Zendy; Daniel M. Mittleman | Zendy; Qianfan Xu | Zendy

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High-Q terahertz Fano resonance with extraordinary transmission in concentric ring apertures

Author(s) -

Jie Shu,

Weilu Gao,

Kimberly S. Reichel,

Daniel V. Nickel,

Jason Dominguez,

Igal Brener,

Daniel M. Mittleman,

Qianfan Xu

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.003747

Subject(s) - fano resonance , optics , fano plane , terahertz radiation , resonance (particle physics) , physics , concentric , polarization (electrochemistry) , extraordinary optical transmission , surface plasmon polariton , surface plasmon , plasmon , geometry , atomic physics , chemistry , mathematics

We experimentally demonstrate a polarization-independent terahertz Fano resonance with extraordinary transmission when light passes through two concentric subwavelength ring apertures in the metal film. The Fano resonance is enabled by the coupling between a high-Q dark mode and a low-Q bright mode. We find the Q factor of the dark mode ranges from 23 to 40, which is 3~6 times higher than Q of bright mode. We show the Fano resonance can be tuned by varying the geometry and dimension of the structures. We also demonstrate a polarization dependent Fano resonance in a modified structure of concentric ring apertures.

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