Type

Journal Article

Authors

T. Seideman
M. Sukharev
Colm O'Dwyer
H. J. Lezec
J. Weiner
O. Alloschery
G. Gay

Subjects

Physics

Topics
finite difference method surface waves transmission electron microscopy time domain analysis surface structure silver maxwell s equations interferometry

Surface quality and surface waves on subwavelength-structured silver films (2007)

Abstract We analyze the physical-chemical surface properties of single-slit, single-groove subwavelength-structured silver films with high-resolution transmission electron microscopy and calculate exact solutions to Maxwell’s equations corresponding to recent far-field interferometry experiments using these structures. Contrary to a recent suggestion the surface analysis shows that the silver films are free of detectable contaminants. The finite-difference time-domain calculations, in excellent agreement with experiment, show a rapid fringe amplitude decrease in the near zone (slit-groove distance out to 3–4 wavelengths). Extrapolation to slit-groove distances beyond the near zone shows that the surface wave evolves to the expected bound surface plasmon polariton (SPP). Fourier analysis of these results indicates the presence of a distribution of transient, evanescent modes around the SPP that dephase and dissipate as the surface wave evolves from the near to the far zone.
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Full list of authors on original publication

T. Seideman, M. Sukharev, Colm O'Dwyer, H. J. Lezec, J. Weiner, O. Alloschery, G. Gay

Experts in our system

1
Colm O'Dwyer
University College Cork
Total Publications: 121