Surface electromagnetic modes in prolate spheroids of gold, aluminum, and copper

Abstract

Optical absorbance measurements are presented for discontinuous films of gold, aluminum, and copper as a function of wavelength, polarization, and angle. Anomolous peaks in the absorbance spectra are observed for all three metals. Two peaks are detected for gold, and one peak is detected for both aluminum and copper. Comparison with electromagnetic theory is made on the basis that the microstructures can be modeled as prolate spheroids. The theoretical model is tested experimentally for various minor-to-major-axis ratios of the spheroid.

© 1988 Optical Society of America

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

Fabrice Meriaudeau, Todd R. Downey, Ali Passian, Andrew Wig, and Thomas L. Ferrell
Appl. Opt. 37(34) 8030-8037 (1998)

Simple model for estimating the electromagnetic enhancement in surface-enhanced Raman scattering from molecules adsorbed onto metal particles coated with overlayers

Cherry A. Murray
J. Opt. Soc. Am. B 2(8) 1330-1339 (1985)

Surface-enhanced electric intensities on transition- and noble-metal spheroids

M. P. Cline, P. W. Barber, and R. K. Chang
J. Opt. Soc. Am. B 3(1) 15-21 (1986)

Interaction of radially polarized focused light with a prolate spheroidal nanoparticle

Kürşat Şendur and Ahmet Şahinöz
Opt. Express 17(13) 10910-10925 (2009)

Optical properties of gold and aluminum island films with regard to grain size and interisland spacing distributions

Ewa Dobierzewska-Mozrzymas, Jerzy Peisert, and Piotr Bieganski
Appl. Opt. 27(1) 181-185 (1988)