Imaging optical near fields at metallic nanoscale voids

Lacharmoise, P. D., Tognalli, N. G., Goni, A. R., Alonso, M. I., Fainstein, A., Cole, R. M., Baumberg, J. J., de Abajo, J. Garcia and Bartlett, P. N. (2008) Imaging optical near fields at metallic nanoscale voids. Physical Review B, 78 12: . doi:10.1103/PhysRevB.78.125410

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Author Lacharmoise, P. D.
Tognalli, N. G.
Goni, A. R.
Alonso, M. I.
Fainstein, A.
Cole, R. M.
Baumberg, J. J.
de Abajo, J. Garcia
Bartlett, P. N.
Title Imaging optical near fields at metallic nanoscale voids
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
1550-235X
Publication date 2008-09-15
Sub-type Article (original research)
DOI 10.1103/PhysRevB.78.125410
Open Access Status File (Publisher version)
Volume 78
Issue 12
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract Direct imaging of the electromagnetic fields generated by plasmon excitation at gold nanoscale voids is achieved with high spatial resolution using scanning near-field optical microscopy (SNOM). The spatial intensity distribution of the electromagnetic field in spherical Au void structures strongly depends on the light excitation wavelength and on the diameter and degree of truncation of the voids. Comparing the SNOM results with reflectivity measurements and boundary element calculations allows for a clear identification of the plasmon modes being activated in each case. The unique mapping of the high-field regions provides key information for the use of void nanostructures as substrates for surface-enhanced Raman scattering.
Keyword Microscopy
Films
Light
Plasmons
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # 125410

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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