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Enlarging the Bandwidth of Nano-scale Propagating Plasmonic Modes in Deep-subwavelength Cylindrical Holes

Published online by Cambridge University Press:  01 February 2011

Peter B. Catrysse  and
Shanhui Fan
Peter B. Catrysse
Affiliation:
[email protected], Stanford University, Electrical Engineering, E. L. Ginzton Laboratory, Box N-126, 450 Via Palou, Stanford, CA, 94301-4088, United States
Shanhui Fan
Affiliation:
[email protected], Stanford University, Stanford, CA, 94305-4088, United States
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Abstract

Subwavelength cylindrical holes in optically thick metallic films always support a propagating HE11 mode near the surface plasmon frequency, regardless of how small the holes are. For holes filled with a uniform dielectric material, the bandwidth of the HE11 mode asymptotically approaches zero as the hole size is reduced to deep-subwavelength scales. We show that it is possible to create nano-scale propagating plasmonic modes with very large bandwidth in holes that are concentrically filled with two different dielectric materials, even when the hole radius goes to zero.

Keywords

optical propertiesmetalnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1055: Symposium GG – Excitons and Plasmon Resonances in Nanostructures , 2007 , 1055-GG09-06
Copyright
Copyright © Materials Research Society 2008

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References

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