Abstract
This work develops the plasmonic microdisk filter/coupler, whose effectiveness is evaluated by finite-difference time-domain simulation and theoretical analyses. Multi-layer dielectric cladding is used to prevent the scattering of surface plasmons (SPs) from a silver microdisk. This method allows devices that efficiently perform filter/coupler functions to be developed. The resonant conditions and the effective refractive index of bounded SP modes on the microdisk are determined herein. The waveguide-to-microdisk distance barely influences the resonant wavelength but it is inversely related to the bandwidth. These findings are consistent with predictions made using the typical ring resonator model.
Original language | English |
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Article number | 020701 |
Journal | Physics of Plasmas |
Volume | 20 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2013 Feb |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics