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Transmission properties of light through a vertical nanoslit milled in a metal film with a defected horizontal nanocavity by introducing a groove-cut nanostrip nearby are investigated. It is observed that the transmittance can be substantially changed in a large range when adjusting the depth of the groove or its position cut in the horizontal nanocavity. Moreover, the variations of the transmittance...
The transmission of normally incident plane wave through an array of subwavelength metallic slits curved with perpendicular waveguides has been explored. Two-dimensional electromagnetic fields inside and near the metal film are simulated by the finite-difference time-domain (FDTD) method. The perpendicular waveguides in the middle of slits affect the modes of slits in two different manners: commonly,...
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