Near-field excitation and near-field detection of propagating surface plasmon polaritons on Au waveguide structures

The propagation of surface plasmon polaritons guided along Au metal waveguides fabricated by electron-beam lithography is experimentally investigated using simultaneous near-field excitation and detection of plasmon-polariton modes localized at the air/Au interface. The directly measured propagation characteristics of surface plasmon-polaritons agree well with simulation results obtained using full-vector calculations and the analytic dispersion of asymmetric plasmonic waveguides for thin Au films. Our results demonstrate that near-field excitation/detection schemes are well suited for direct imaging and characterization of propagating surface plasmon-fields bound to thin-film metal layers, and can be used for fast and reliable characterization of plasmonic waveguide elements and nanodevices.


Published in:
Applied Physics Letters, 94, 24, 243118
Year:
2009
Publisher:
American Institute of Physics
ISSN:
0003-6951
Keywords:
Laboratories:




 Record created 2011-06-06, last modified 2018-01-28


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