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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Exploring plasmonic coupling in hole-cap arrays.

Thomas M Schmidt¹, Maj Frederiksen¹, Vladimir Bochenkov²

¹Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus, Denmark.

Beilstein Journal of Nanotechnology

|February 12, 2015

Summary

This summary is machine-generated.

Plasmonic coupling between gold caps and hole arrays was studied. Close proximity enables strong coupling to surface plasmon polariton and resonance modes, revealing field distribution details.

Keywords:

SRO hole arrays caps colloidal lithography hybridization localized surface plasmon resonance near field

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Area of Science:

Nanophotonics
Plasmonics
Materials Science

Background:

Surface plasmon polaritons (SPPs) and localized surface plasmon resonances (LSPRs) are crucial for nanoscale optical phenomena.
Controlling the interaction between different plasmonic structures is key to designing advanced optical devices.

Purpose of the Study:

To investigate the plasmonic coupling between gold caps and gold hole arrays in thin films.
To understand how vertical spacing influences the coupling dynamics and resulting optical properties.

Main Methods:

Experimental investigation using sparse colloidal lithography and thermal treatment to control spacing.
Finite-difference time-domain (FDTD) simulations for theoretical analysis.
Optical spectroscopy to characterize the plasmonic responses.

Main Results:

Strong plasmonic coupling observed between gold caps and hole arrays when in close proximity.
Coupling affects both Bloch Wave-surface plasmon polariton (BW-SPP) and localized surface plasmon resonance (LSPR) modes.
Detailed field distributions were revealed through experimental and simulation data.

Conclusions:

Close proximity is essential for significant plasmonic coupling between caps and hole arrays.
The studied structures exhibit complex coupling behaviors with tunable optical properties.
These findings offer insights into fabricating and utilizing coupled plasmonic systems.