Abstract
The seamless transition between microscale photonics and nanoscale plasmonics requires overpassing different waveguiding mechanisms and a few orders of magnitude in the lateral dimension. Exploiting gap plasmon–polariton waves both at the microscale and nanoscale with an ultrashort (few micrometers) non adiabatic tapered gap plasmon waveguide, we show theoretically that very high-power transfer efficiency is achieved. The same mechanism may be used to harvest impinging light waves and direct them into a nanhole or slit to exhibit an anomalous transmission without the conventional periodic structures. The interplay of plasmonic and oscillating modes is analyzed.
© 2006 Optical Society of America
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