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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Dispersion relations for coupled surface plasmon-polariton modes excited in multilayer structures
Hikaru Saito1, Kyoko Namura, Motofumi Suzuki
1Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Microscopy (Oxford, England)
|November 29, 2013
Summary
Researchers studied coupled surface plasmon-polariton (SPP) modes in Al/SiO2/Al films using angle-resolved electron energy-loss spectroscopy. Results showed good agreement between experimental and calculated dispersion relations, highlighting sensitivity to film thickness.
Area of Science:
- Condensed matter physics
- Materials science
- Nanophotonics
Background:
- Surface plasmon-polaritons (SPPs) are crucial for nanoscale optical phenomena.
- Multilayer structures offer tunable plasmonic properties.
- Understanding SPP mode coupling is key for optical device design.
Purpose of the Study:
- To analyze coupled SPP modes in Al/SiO2/Al multilayer structures.
- To experimentally observe and compare SPP dispersion relations with theoretical predictions.
- To investigate the influence of film thickness on SPP mode coupling.
Main Methods:
- Angle-resolved electron energy-loss spectroscopy (AREELS) with a relativistic electron probe.
- Experimental observation of SPP dispersion relations.
- Comparison with theoretically calculated dispersion relations.
Main Results:
- Good agreement between experimental and calculated dispersion relations for coupled SPP modes.
- Sensitivity of the coupled SPP mode dispersion relation to individual film thicknesses.
- Qualitative interpretation of thickness dependence using electron energy-loss probability calculations.
Conclusions:
- AREELS is effective for analyzing coupled SPP modes in multilayer structures.
- Film thickness is a critical parameter for tuning SPP dispersion in Al/SiO2/Al systems.
- The study provides insights into the excitation probability differences based on coupling modes.
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