Article

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

Physics School and Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China.
Optics Letters (impact factor: 3.4). 05/2011; 36(10):1905-7.
Source: PubMed

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.

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