Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3300839
Keywords
dielectric-loaded waveguides; metallic thin films; plasmonics; polaritons; surface plasmons
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Funding
- European Commission [EC FP6 IST 034754 STREP]
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We investigate the guiding properties of a dielectric-loaded surface plasmon polariton waveguide on a finite-width metal strip. The guided mode is characterized by leakage radiation microscopy for different metal strip widths. We show a strong mode attenuation for metal strip widths below 1.75 mu m at telecom wavelength lambda=1.55 mu m. We estimate the minimal width using numerical methods and propose an original interpretation. Good agreement with the measured data is achieved. The determination of this critical width is a prerequisite for designing miniaturized plasmonics devices.
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