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Updated: May 22, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Imaging slit-coupled surface plasmon polaritons using conventional optical microscopy.
R Mehfuz1, F A Chowdhury, K J Chau
1School of Engineering, The University of British Columbia, Kelowna, British Columbia, Canada.
Optics Express
|May 9, 2012
Summary
We developed a new technique for detecting surface plasmon polaritons (SPPs) using standard optical microscopy. This method enhances SPP coupling efficiency, making nano-plasmonic devices more accessible.
Area of Science:
- Plasmonics
- Nanophotonics
- Optical Microscopy
Background:
- Surface plasmon polaritons (SPPs) are crucial for nano-plasmonic devices.
- Detecting SPPs typically requires specialized near-field techniques.
- Conventional optical microscopy lacks the resolution for direct SPP detection.
Purpose of the Study:
- To develop a method for detecting SPPs using conventional optical microscopy.
- To enhance the coupling efficiency of SPPs.
- To make nano-plasmonic device characterization more accessible and user-friendly.
Main Methods:
- Coupling SPPs using nano-patterned slits in a metal film.
- Employing an ultra-thin polymer layer on the metal surface to tune SPP momentum.
- Utilizing standard optical microscopy with objective lenses for detection.
Main Results:
- Achieved a six-fold enhancement in SPP coupling efficiency at optimal polymer layer thickness.
- Observed bright, visible plasmonic signatures of SPPs under optical microscopy.
- Demonstrated parallel measurement of SPP propagation distance from microscope images.
Conclusions:
- The developed technique enables SPP detection with conventional optical microscopy.
- This advancement significantly improves the accessibility and ease-of-use of nano-plasmonic device technology.
- The method is suitable for characterizing plasmonic devices like plasmonic lenses.
