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Surface-plasmon-enhanced electric fields in two-dimensional arrays of gold nanodisks

Published

Author(s)

Ward L. Johnson, Sudook A. Kim, Zhandos Utegulov, B. T. Draine

Abstract

Electric-field distributions in two-dimensional arrays of gold nanodisks on Si3N4 membranes are modeled, using the discrete-dipole approximation, as a function of nanodisk diameter (20 − 50 nm), height (10 − 100 nm), ratio of the array spacing to diameter (1.3−4.7), and angle of incident light. The primary focus is on fields in a plane near the circular gold/vacuum interface with light of 532 nm wavelength incident through the membrane, a configuration that is particularly relevant to potential applications in plasmon-mediated Brillouin light scattering, photolithography, and photovoltaics. The average intensity over this plane increases with decreasing array spacing and incident angle relative to the substrate normal, partly because of increased excitation of a quadrupolar surface-plasmon mode. The height/diameter ratio for maximum intensities is between 0.7 and 1.5 and not strongly dependent on the spacing for a given angle.
Proceedings Title
SPIE Proceedings, Nano Science and Engineering 2008
Volume
7032
Conference Dates
August 10-14, 2008
Conference Location
San Diego, CA
Conference Title
SPIE Optics and Photonics

Keywords

Surface plasmons, discrete-dipole approximation, electric fields, nanodisk arrays, dipole resonance, quadrupole resonance, Brillouin light scattering

Citation

Johnson, W. , Kim, S. , Utegulov, Z. and Draine, B. (2008), Surface-plasmon-enhanced electric fields in two-dimensional arrays of gold nanodisks, SPIE Proceedings, Nano Science and Engineering 2008, San Diego, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=854107 (Accessed June 15, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created August 4, 2008, Updated February 19, 2017