OPTICAL DEVICE WITH ARRAY OF APERTURES AND METHODS OF MAKING AND USING THE OPTICAL DEVICE

摘要

An optical device includes a metal film defining a plurality of aperture through the metal film and arranged in at least one ring and configured and arranged to transmit light of a predetermined wavelength, ?, and focus the light at a focal point, f. Each of the plurality of apertures having a diameter in the range of 0.05% to 300% of the predetermined wavelength, ?. An array of these optical devices can also be used for a variety of applications.