Applied Physics A

, Volume 89, Issue 2, pp 387–390

Near-field observation of plasmon excitation and propagation on ordered elliptical hole arrays

  • J.-Y. Chu
  • T.-J. Wang
  • J.-T. Yeh
  • M.-W. Lin
  • Y.-C. Chang
  • J.-K. Wang
Article

DOI: 10.1007/s00339-007-4109-3

Cite this article as:
Chu, J., Wang, T., Yeh, J. et al. Appl. Phys. A (2007) 89: 387. doi:10.1007/s00339-007-4109-3

Abstract

We report a near-field study of the excitation and propagation of surface plasmon on ordered Ag elliptical hole arrays with a scattering-type scanning near-field optical microscope. Strong dipole-like local plasmon is identified at each individual hole from near-field optical intensity and phase images. The excitation of the local plasmon at the elliptical hole is found to follow polarization excitation constraint. The coherent superposition of these local plasmon waves to form an extended surface plasmon wave propagating to an adjacent hole array is observed directly. The near-field results are consistent with the results obtained from far-field extraordinary transmission measurements.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • J.-Y. Chu
    • 1
  • T.-J. Wang
    • 1
  • J.-T. Yeh
    • 1
  • M.-W. Lin
    • 1
  • Y.-C. Chang
    • 1
  • J.-K. Wang
    • 2
    • 3
  1. 1.Material and Chemical Research LaboratoriesIndustrial Technology Research InstituteHsinchuR.O.C.
  2. 2.Center for Condensed Matter SciencesNational Taiwan UniversityTaipeiR.O.C.
  3. 3.Institute of Atomic and Molecular SciencesAcademia SinicaTaipeiR.O.C.