Slowing surface plasmon polaritons on plasmonic coupled cavities by tuning grating grooves

Date
2010-09
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Source Title
Applied Physics Letters
Print ISSN
0003-6951
Electronic ISSN
Publisher
American Institute of Physics
Volume
97
Issue
13
Pages
1 - 3
Language
English
Type
Article
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Abstract

We investigate slow surface plasmon polaritons (SPPs) in plasmonic waveguiding bands formed by coupled plasmonic cavities on Moiŕ surfaces. We demonstrate controlling the group velocity and dispersion of the SPPs by varying the depth of the plasmonic Bragg grating groove. Changing the grating depth results in modification of coupling coefficients between the cavities and hence the SPPs group velocity is altered. Variation in the group velocity and dispersion of SPPs can be measured with polarization dependent spectroscopic reflection measurements. Dispersion of SPPs has been calculated by finite-difference time-domain method in agreement with the experimental data.

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Keywords
Coupled cavity, Coupling coefficient, Experimental data, Grating depths, Group velocities, Plasmonic, Reflection measurements, Surface plasmon polaritons, Wave-guiding, Finite difference time domain method, Light velocity, Phonons, Photons, Quantum theory, Solids, Surface plasmon resonance, Plasmons
Citation
Published Version (Please cite this version)