Environment effects on surface-plasmon spectra in gold-island films potential for sensing applications

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Applied Optics

DOI:https://doi.org/10.1364/AO.37.008030· OSTI ID:365841

Meriaudeau, F ^[1]; Downey, T R; Passian, A; Wig, A; Ferrell, T L ^[2]

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1. Laboratoire Electronique Informatique et Image (LE2I), 12 rue de la fonderie, 71200 Le Creusot, France and Photometrics Group, Life Science Division, Oak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, Tennessee 37830 (United States)
2. Department of Physics and Astronomy, The University of Tennessee, 401 A. H. Nielsen Avenue, Knoxville, Tennessee 37996-1200 (United States)

The effects of the local dielectric environment on the surface-plasmon resonances of annealed gold-island films as a potential for sensing applications are studied experimentally and modeled theoretically. Gold-island films were annealed at 600{degree}C to produce spheroidal shape particles that exhibit well-resolved resonances in polarized, angle-resolved, absorption spectra. These resonances are shifted in different amounts by the depolarization effect of the surrounding medium (liquids with various refraction indices). Cross-section calculations based on nonretarded, single-particle, dielectric interaction for these various configurations are presented and are found to be in good agreement with the experimental observations. The results show an interesting potential for biosensing or environmental monitoring applications. {copyright} 1998 Optical Society of America

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 365841
• Journal Information: Applied Optics, Journal Name: Applied Optics Journal Issue: 34 Vol. 37; ISSN APOPAI; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
COATINGS
DIELECTRIC TENSOR
GOLD
POLARIZATION
QUARTZ
THIN FILMS
VISIBLE SPECTRA