Abstract
A novel nanostructure grating with broadband reflection is proposed and analyzed in thispaper. The grating is based on a hybrid plasmonic slot waveguide that consists of a verticaldielectric-slot incorporated at the gap between the upper silicon rib and the metalsubstrate. The structure could provide an ultra-tight mode confinement in the cross-sectionwhile maintaining a relatively low propagation loss. By exploiting the superior modalproperties, an ultra-compact and broadband Bragg grating is presented, which shows thecapability of efficient wavelength selection near the telecom bandwidths. Thewaveguide-based Bragg grating could be used as a filter in telecommunicationsystems and could be a promising candidate for future integrated photonic circuits.
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