Abstract

The transmission of light through a single nanoslit milled in the metallic film is enhanced by using an array of nanocavity antennas. It is shown that transmission efficiency through a 25-nm-wide silver nanoslit can be enhanced to η=151 when six pairs of nanostrips are placed 50nm away from the input surface of the silver film at wavelength λ0=1μm. The influences of both the nanoslit position and the slit-to-strip distance on the extraordinary transmission are investigated, and the physical mechanism is explained.

© 2009 Optical Society of America

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