Escaping diffraction
DOIAbstract
AbstractAn international team of physicists led by Henri Lezec and Thomas Ebbesen of the Louis Pasteur University in Strasbourg has shown that large amounts of light can pass through a sub_wavelength aperture in a patterned metal film without being diffracted. Lezec and co_workers created a sub_wavelength aperture in a thin silver film and etched a periodic pattern of grooves around it, using a focused ion beam. By patterning the reverse side of the film, they also discovered that the light emerges from the hole as a tightly focused beam that can propagate with very little divergence. The team then found that the direction of the transmitted light could be controlled by changing the symmetry of the periodic pattern. The technique may be use...
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