We show a sharp Fano resonance when terahertz waves pass through two concentric ring apertures in a metal film. A high-Q and intensive dark mode is indirectly excited by coupling to a low-Q bright mode.
© 2012 OSA
J. Shu and Q. Xu, "High-Q THz Fano Resonance in Concentric Ring Apertures," in Conference on Lasers and Electro-Optics 2012, OSA Technical Digest (online) (Optical Society of America, 2012), paper CTh1D.4.
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