Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published August 26, 2002 | Published
Journal Article Open

Observation of coupled plasmon-polariton modes in Au nanoparticle chain waveguides of different lengths: Estimation of waveguide loss


Near-field interactions between closely spaced Au nanoparticles were characterized by studying the spectral position of the extinction bands corresponding to longitudinal (L) and transverse (T) plasmon-polariton modes of Au nanoparticle chains. Far-field spectroscopy and finite-difference time-domain simulations on arrays of 50 nm diameter Au spheres with an interparticle spacing of 75 nm both show a splitting DeltaE between the L and T modes that increases with chain length and saturates at a length of seven particles at DeltaE = 65 meV. We show that the measured splitting will result in a propagation loss of 3 dB/15 nm for energy transport. Calculations indicate that this loss can be reduced by at least one order of magnitude by modifying the shape of the constituent particles.

Additional Information

© 2002 American Institute of Physics. (Received 14 May 2002; accepted 8 July 2002) The authors would like to thank Richard Muller and Paul Maker of the Jet Propulsion Laboratory in Pasadena for expert technical assistance. This work was sponsored by the NSF (Grant No. ECS0103543) and the Center for Science, Engineering of Materials at Caltech, and the Air Force Office of Scientific Research.

Attached Files

Published - MAIapl02.pdf


Files (78.5 kB)
Name Size Download all
78.5 kB Preview Download

Additional details

August 21, 2023
October 13, 2023