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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

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Published on: July 21, 2018

Coupling dielectric waveguide modes to surface plasmon polaritons.

H Ditlbacher1, N Galler, D M Koller

  • 1Karl-Franzens University and Erwin Schrödinger Institute for Nanoscale Research, Graz, Austria. harald.ditlbacher@uni-graz.at

Optics Express
|July 9, 2008
PubMed
Summary
This summary is machine-generated.

Researchers demonstrated coupling between dielectric waveguide modes and surface plasmons in thin film multilayers. This hybrid approach shows potential for integrated photonic circuits and sensors.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Dielectric/metal thin film multilayers are key for manipulating light at the nanoscale.
  • Coupling between dielectric waveguide modes and surface plasmons is crucial for advanced optical devices.

Purpose of the Study:

  • To investigate the coupling phenomena in dielectric/metal thin film multilayers.
  • To confirm calculated coupling characteristics with experimental data.
  • To explore the integration potential of hybrid dielectric/plasmonic systems.

Main Methods:

  • Calculation of dispersion relations for extended multilayers.
  • Measurement of angle-resolved reflectance.
  • Lateral structuring of multilayers for microscopy.
  • Fluorescence-based microscopy to observe mode coupling.

Main Results:

  • Confirmed coupling between dielectric waveguide modes and surface plasmons.
  • Observed direct coupling via lateral structuring and fluorescence microscopy.
  • Determined a coupling length of 15 micrometers at a 514nm wavelength.

Conclusions:

  • Hybrid dielectric/metal waveguides enable efficient coupling of optical and plasmonic modes.
  • Demonstrated potential for integrating surface plasmon functionalities into optical devices.
  • Highlights applicability in photonic circuitry and sensing applications.