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Near-Field Intensity Correlations in Semicontinuous Metal-Dielectric Films
Physical Review Letters
  • K. Seal
  • A. K. Sarychev
  • H. Noh
  • D. A. Genov
  • Alexey Yamilov, Missouri University of Science and Technology
  • V. M. Shalaev
  • Z. C. Ying
  • Hui Cao
Spatial intensity correlation functions are obtained from near-field scanning optical microscope measurements of semicontinuous metal-dielectric films. The concentration of metal particles on a dielectric surface is varied over a wide range to control the scattering strength. At low and high metal coverages where scattering is weak, the intensity correlation functions exhibit oscillations in the direction of incident light due to excitation of propagating surface waves. In the intermediate regime of metal concentration, the oscillatory behavior is replaced by a monotonic decay as a result of strong scattering and anomalous absorption. Significant differences in the near-field intensity correlations between metallic and dielectric random systems are demonstrated.
United States. Army Research Office
National Science Foundation (U.S.)
Keywords and Phrases
  • Dielectric Thin Films,
  • Discontinuous Metallic Thin Films,
  • Near-Field Scanning Optical Microscopy,
  • Surface Plasmons
Document Type
Article - Journal
Document Version
Final Version
File Type
© 2005 American Physical Society (APS), All rights reserved.
Publication Date
Citation Information
K. Seal, A. K. Sarychev, H. Noh, D. A. Genov, et al.. "Near-Field Intensity Correlations in Semicontinuous Metal-Dielectric Films" Physical Review Letters (2005)
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