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Direct imaging of propagation and damping of near-resonance surface plasmon polaritons using cathodoluminescence spectroscopy

van Wijngaarden, J. T. and Verhagen, E. and Polman, A. and Ross, C. E. and Lezec, H. J. and Atwater, H. A. (2006) Direct imaging of propagation and damping of near-resonance surface plasmon polaritons using cathodoluminescence spectroscopy. Applied Physics Letters, 88 (22). Art. No. 221111. ISSN 0003-6951. doi:10.1063/1.2208556.

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Cathodoluminescence imaging spectroscopy is used to determine the propagation distance of surface plasmon polaritons near the surface plasmon resonance on both silver and gold films. Surface plasmon polaritons are generated by a focused (diameter of 5 nm) electron beam spot in the metal and coupled out through a grating. By gradually varying the distance between the excitation spot and the grating the damping is probed. Propagation lengths as small as several hundred nanometers are probed, and an increase in propagation length is observed if the wavelength is increased above resonance. The measured data are compared with the calculated propagation lengths taking into account both absorption in the film and leakage radiation, and it is found that other loss mechanisms appear to be significant as well.

Item Type:Article
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Polman, A.0000-0002-0685-3886
Atwater, H. A.0000-0001-9435-0201
Additional Information:© 2006 American Institute of Physics (Received 27 January 2006; accepted 19 April 2006; published online 1 June 2006) Chris Retif is gratefully acknowledged for assistance in nanofabrication of the samples and Hans Zeijlemaker for the technical assistance during the installation of the CL system. This work was made possible by the fabrication and characterization facilities of the Amsterdam nanoCenter. It is part of the research program of the "Stichting voor Fundamenteel Onderzoek der Materie (FOM)," which is financially supported by the "Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)." It is also part of NANONED, a nanotechnology program of the Dutch Ministry of Economic Affairs. The Caltech portion of this work was supported by the Air Force Office of Scientific Research under MURI Grant No. FA9550-04-1-0434. One of the authors (C.R.) acknowledges fellowship support from the Department of Defense fellowship program, and another author (H.A.A.) acknowledges support from AMOLF's Joop Los Fellowship.
Funding AgencyGrant Number
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Ministry of Economic Affairs (Netherlands)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)FA9550-04-1-0434
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Subject Keywords:silver; gold; metallic thin films; cathodoluminescence; surface plasmon resonance; polaritons
Issue or Number:22
Record Number:CaltechAUTHORS:WIJapl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3672
Deposited By: Archive Administrator
Deposited On:26 Jun 2006
Last Modified:08 Nov 2021 20:11

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