Abstract
The transmission of light through an aperture in a metal film isextremely small when the aperture diameter is much smaller thanthe optical wavelength. But when the metal surface surroundingthe subwavelength hole is corrugated, the incident light cancouple to surface plasmons (SP), excitation modes on the metalsurface. A resonant interaction leads to an enhanced transmission at wavelengths determined by the corrugation pitch.We discuss applications of the SP enhancedtransmission in near-field scanning optical microscopyand in high-density optical data storage.
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