Journal
PLASMONICS
Volume 9, Issue 5, Pages 1163-1169Publisher
SPRINGER
DOI: 10.1007/s11468-014-9727-y
Keywords
Surface plasmon polariton; Plasmonic filter; Coupled-mode theory; Finite-difference time-domain method; Integrated optics devices
Funding
- Fundamental Research Funds for the Central Universities of Central South University [2012zzts007, 2013zzts009]
- Research Fund for the Doctoral Program of Higher Education of China [20100162110068]
- National Natural Science Foundation of China [61275174]
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By taking the aperture as a resonator, we propose an analytical model to describe the dynamic transmission in metal-dielectric-metal (MDM) waveguide aperture-side-coupled with slot cavity. The theoretical results and the finite-difference time-domain (FDTD) simulations agree well with each other, and both demonstrate the mode selectivity and filtering tunability of the plasmonic structure. By adjusting the phase shifts in slot cavity or resonance frequency determined by the aperture, one can realize the required transmission spectra and slow light effect. The theoretical analysis may open up avenues for the control of light in highly integrated optical circuits.
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