TITLE

Crucial role of metal surface in enhanced transmission through subwavelength apertures

AUTHOR(S)
Grupp, D. E.; Grupp, D.E.; Lezec, H. J.; Lezec, H.J.; Ebbesen, T. W.; Ebbesen, T.W.; Pellerin, K. M.; Pellerin, K.M.; Thio, Tineke
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/11/2000, Vol. 77 Issue 11
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In order to understand the details of the extraordinary enhancement of the optical transmission through subwavelength holes in metal films, we have fabricated perforated free-standing metal films where the nature of the bulk and surfaces can be controlled independently. We find that the transmission enhancement depends only on the dielectric properties of the metal within a skin depth of the two in-plane surfaces and not on those of the film core, nor on the metal constituting the hole walls. This provides direct and conclusive evidence that the phenomenon is mediated by surface plasmons. © 2000 American Institute of Physics.
ACCESSION #
4413739

 

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