One-Step Leapfrog HIE-FDTD Modeling of Plasmonic Structures Using Partial-Fraction Dispersion Models
An improved one-step Leapfrog hybrid implicit-explicit finite-Difference Time-Domain (HIE-FDTD) method is developed for simulating complex plasmonic structures that comprise dispersive materials over an ultra-wide optical frequency range. The dispersive media is described by a partial fraction (PF)...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8786237/ |
| Summary: | An improved one-step Leapfrog hybrid implicit-explicit finite-Difference Time-Domain (HIE-FDTD) method is developed for simulating complex plasmonic structures that comprise dispersive materials over an ultra-wide optical frequency range. The dispersive media is described by a partial fraction (PF) dispersion model by using the vector fitting technique and further implemented into the Leapfrog HIE-FDTD scheme via an auxiliary difference equation (ADE) formulation. The performance of the proposed method is evaluated in optical response of a multi-functional plasmonic structure which can act as a dynamically tunable band-stop filter and refractive index sensor. Simulation results demonstrate good numerical accuracy and high computational efficiency and may find some potential applications in sensing, detecting and optical communications. |
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| ISSN: | 2169-3536 |