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Opt Express. 2013 May 6;21(9):11101-6. doi: 10.1364/OE.21.011101.

Fano resonance in concentric ring apertures.

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  • 1Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA.

Abstract

We demonstrate a polarization-independent mid-infrared Fano resonance with extraordinary transmission when light passes through two concentric metallic ring apertures. A high-Q dark mode is indirectly excitated by coupling with a low-Q bright mode. A coupled optical resonator model is used to analyze the coupling process between the bright and dark modes. We find the Q of the dark mode is 3~6 times higher than that of the bright mode. We show that the dark mode can be selectively disabled without affecting the bright mode.

PMID:
23669966
[PubMed - indexed for MEDLINE]
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