Abstract
Propagation of surface plasmons on gold in the range over distances was characterized by cathodoluminescence spectroscopy. Surface plasmons were excited by an electron beam near a grating milled in the gold. The spectra of outcoupled radiation reveal increasingly strong propagation losses as surface plasmon energy increases above , but little effect in the range . These results are in partial agreement with theoretical expectations.
© 2008 Optical Society of America
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