Broadband light funneling in ultrasubwavelength channels having periodic connected unfilled apertures
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United States of America Patent
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Aug 1, 2017
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N/A
app pub date -
Oct 8, 2013
filing date -
Oct 10, 2012
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Abstract
A structure for broadband light funneling comprises a two-dimensional periodic array of connected ultrasubwavelength apertures, each aperture comprising a large sub-aperture that aids in the coupling of the incoming incident light and a small sub-aperture that funnels a significant fraction of the incident light power. The structure possesses all the capabilities of prior extraordinary optical transmission platforms, yet operates nonresonantly on a distinctly different mechanism. The structure demonstrates efficient ultrabroadband funneling of optical power confined in an area as small as ˜(λ/500)2, where optical fields are enhanced, thus exhibiting functional possibilities beyond resonant platforms.
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