Nano Archive

Plasmonic modes of annular nanoresonators imaged by spectrally resolved cathodoluminescence

Hofmann, Carrie E. and Vesseur, Ernst Jan R. and Sweatlock, Luke A. and Lezec, Henri J. and García de Abajo, Javier and Polman, Albert and Atwater, Harry A. (2007) Plasmonic modes of annular nanoresonators imaged by spectrally resolved cathodoluminescence. NANO LETTERS, 7 (12). pp. 3612-3617.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl071789f

Abstract

We report the observation of plasmonic modes of annular resonators in nanofabricated Ag and Au surfaces that are imaged by spectrally resolved cathodoluminescence. A highly focused 30 keV electron beam is used to excite localized surface plasmons that couple to collective resonant modes of the nanoresonators. We demonstrate unprecedented resolution of plasmonic mode excitation and by combining these observations with full-field simulations find that cathodoluminescence in plasmonic nanostructures is most efficiently excited at positions corresponding to antinodes in the modal electric field intensity.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Photonics
ID Code:1841
Deposited By:Farnush Anwar
Deposited On:23 Dec 2008 10:36
Last Modified:23 Dec 2008 10:36

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