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Compact Antenna for Unidirectionally Coupling Surface Plasmons with Ultra-broadband and Wide-angle Efficiency

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Abstract

A novel ultra-broadband and wide-angle plasmonic antenna composed of two cascaded sub-gratings is proposed, with ultra-broad spectral full-width-half-maximum (FWHM) of 400 nm and wide angular FWHM of 25°, nearly 4 times greater than that of the periodic reference gratings.

© 2013 Optical Society of America

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