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Surface-polariton propagation for scanning near-field optical microscopy application.

Authors
Type
Published Article
Journal
Journal of microscopy
Publication Date
Volume
194
Issue
Pt 2-3
Pages
567–570
Identifiers
PMID: 11388308
Source
Medline
License
Unknown

Abstract

Surface plasmon-, phonon- and exciton-polaritons exist on specific materials in specific spectral regions. We assess the properties of such travelling surface-bound electromagnetic waves relevant for scanning near-field optical microscopy applications, i.e. the tightness of surface binding, the attenuation, the phase velocity and the coupling with free-space electromagnetic waves. These quantities can be directly determined by photographic imaging of surface plasmon- and surface phonon-polaritons, in both the visible and mid-infared regions. Focusing of mid-infrared surface plasmons is demonstrated. Surface waveguides to transport and focus photons to the tip of a scanning near-field probe are outlined.

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