Dependence of surface plasmon lifetimes on the hole size in two-dimensional metallic arrays

J. Li, H. Iu, Dangyuan Lei, J. T.K. Wan, J. B. Xu, H. P. Ho, M. Y. Waye, H. C. Ong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)

Abstract

Two-dimensional metallic arrays with different hole sizes have been fabricated by using interference lithography and their optical properties have been studied by using angle-dependent reflectivity measurements. The lifetimes of different surface plasmon polariton (SPP) modes have been determined from the linewidths of reflectivity spectra for different resonance wavelengths and hole sizes. It is found that the lifetimes display an λndependence, where n is strongly dependent on hole radius. In particular, n is found to be ∼4 for small hole, as expected from Rayleigh dipole scattering, and linearly increases to ∼11 when the hole radius is increased to 177 nm. By plotting n with hole radius, the relationship between n and hole radius is found.
Original languageEnglish
Article number183112
JournalApplied Physics Letters
Volume94
Issue number18
DOIs
Publication statusPublished - 18 May 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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