Abstract

Transversely localized resonance of antisymmetric-bound surface plasmons (ab-SP) at ultrathin metal stripes in a subwavelength array suppresses optical transmission in a broadband. Here, asymmetric binary arrays of ultrathin metal stripes are proposed to introduce a narrow transmission peak in the stop-band (i.e., plasmon-induced transparency), based on destructive interference of antisymmetrically excited ab-SP resonance modes at the neighboring binary metal stripes. The phenomenon is numerically demonstrated and explained with a mesoscopic model, in which mesoscopic interaction processes are abstracted as different transmission channels to cooperatively result in the narrow peak in a broad transmission valley. In spite of the ultrathin feature of the structure for convenience in fabrication, its excellent performance facilitates potential applications.

© 2016 Optical Society of America

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