Unidirectional optical transmission in dual-metal gratings in the absence of anisotropic and nonlinear materials

Abstract

We predict the unidirectional optical transmission in dual-metal grating structures composed of two gratings with different structures in the absence of anisotropy and nonlinearity. The zero-order unidirectional transmission is achieved. Based on the unique property and by modulating the structural parameters, the transmittance approaches to 0% and 60% in the two opposite directions, respectively.

© 2011 Optical Society of America

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