Rayleigh anomaly-surface plasmon polariton resonances in palladium and gold subwavelength hole arrays

H. Gao, J. M. McMahon, M. H. Lee, J. Henzie, S. K. Gray, G. C. Schatz, T. W. Odom

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

Surface plasmon polaritons (SPPs) and Rayleigh anomalies (RAs) are two characteristic phenomena exhibited by periodic grating structures made of plasmonic materials. For Au subwavelength hole arrays, SPPs and RAs from opposite sides of the film can interact under certain conditions to produce highly intense, narrow spectral features called RA-SPP resonances. This paper reports how RA-SPP effects can be achieved in subwavelength hole arrays of Pd, a weak plasmonic material. Well-defined resonances are observed in measured and simulated optical transmission spectra with RA-SPP peaks as narrow as 45 nm (FWHM). Dispersion diagrams compiled from angle-resolved spectra show that RA-SPP resonances in Pd hole arrays shift in wavelength but do not decrease significantly in amplitude as the excitation angle is increased, in contrast with RA-SPP peaks in Au hole arrays. The apparent generality of the RA-SPP effect enables a novel route to optimize resonances in non-traditional plasmonic media.

Original languageEnglish
Pages (from-to)2334-2340
Number of pages7
JournalOptics express
Volume17
Issue number4
DOIs
Publication statusPublished - Feb 16 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Rayleigh anomaly-surface plasmon polariton resonances in palladium and gold subwavelength hole arrays'. Together they form a unique fingerprint.

  • Cite this