Thickness dependence of surface plasmon polariton dispersion in transparent conducting oxide films at 1.55 μm

F. Michelotti, L. Dominici, E. Descrovi, N. Danz, F. Menchini

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Abstract

We experimentally demonstrate propagation of surface plasmon polaritons in the near-IR window λ ∈ (1.45 μm, 1.59 μm) at the interface of indium-tin-oxide films with different thicknesses deposited on glass. Dispersion of such polaritons is strongly dependent on the film thickness, putting into evidence a regime in which polaritons at both films's interfaces are coupled in surface supermodes. The experimental data are shown to be in good agreement with the analytical model for thin and absorbing conducting films. Measurements on aluminum-doped zinc oxide, characterized by a redshifted plasma resonance, do not show any surface plasmon polariton excitation in the same wavelength window. © 2009 Optical Society of America.
Original languageEnglish
Pages (from-to)839 - 841
Number of pages3
JournalOptics Letters
Volume34
Issue number6
DOIs
Publication statusPublished - 15 Mar 2009

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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