Cross-shaped resonator topologies for realization of metal–insulator–metal (MIM) plasmonic filters are introduced and comprehensively studied. The structures are numerically simulated using finite difference time domain method. It is shown that single-mode MIM filters can be obtained using the proposed topologies for the wavelength range of 400 nm to 2 μm. Analytical formulas for designing the filters have also been proposed. As an important application, the cross-shaped resonators can be used for design of low-cross-talk waveguide intersections. The simplicity of the design, the ability to use analytical formulas, and obtaining a single-mode resonance are the benefits of the proposed cross-shaped topologies.
Plasmonic demultiplexers using improved circular nanodisk resonators (CNRs) and metal-insulator-metal waveguides have been designed. The proposed structures use air and silver as insulator and metal layers, respectively. The relative permittivity of silver has been characterized by Drude, Palik, and Drude–Lorentz models in our finite-difference time-domain simulations. To obtain demultiplexers, first two filters based on improved CNRs are designed. One of the most outstanding features of a CNR is that the resonance wavelength can be tuned by changing its radius. It is shown that increasing the CNRs radii for the single-mode bandpass filter increases the resonance wavelength, linearly. Accordingly, double and triple-wavelength demultiplexers (DeMuxes) have been proposed for the wavelength range of 600 to 2000 nm. Due to their small area, the proposed demultiplexers can be applied in integrated optical circuits for optical communication purposes.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.