Journal
OPTICS EXPRESS
Volume 18, Issue 17, Pages 17922-17927Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.017922
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Funding
- National Natural Science Foundation of China [10874239, 10604066]
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A novel and simple plasmonic filter based on metal-insulator-metal plasmonic waveguides with a nanodisk resonator is proposed and investigated numerically. By the resonant theory of disk-shaped nanocavity, we find that the resonance wavelengths can be easily manipulated by adjusting the radius and refractive index of the nanocavity, which is in good agreement with the results obtained by finite-difference time-domain (FDTD) simulations. In addition, the bandwidths of resonance spectra are tunable by changing the coupling distance between the nanocavity and waveguides. This result achieved by FDTD simulations can be accurately analyzed by temporal coupled mode theory. Our filters have important potential applications in high-density plasmonic integration circuits. (C) 2010 Optical Society of America
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