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Free keywords:
SURFACE-PLASMONS; DIFFRACTION LIMIT; WAVE-GUIDES; EXCITATION; FIBERS;
VECTOR; ENERGY; LIGHTOptics;
Abstract:
We report direct observation of the 2D transverse near-field intensity and polarisation distribution of surface plasmon polaritons guided on metal nanowires. Quadrupolar modes are excited on an array of coupled nanowires arranged around the central glass core in a photonic crystal fibre, with lobes whose orientation depends on the polarisation state of the launched core light. The radial electric field is resolved using a polarization sensitive near-field probe in light-collection mode. (C) 2012 Optical Society of America
