6533b855fe1ef96bd12b0083
RESEARCH PRODUCT
Surface-Impedance Formulation for Hollow-Core Waveguides Based on Subwavelength Gratings
Angela CovesHaroldo MaestreRaimon ArchilesMiguel V. AndresBenito Gimenosubject
Ones electromagnètiquesGeneral Computer ScienceGeneral EngineeringPhysics::OpticsGeneral Materials ScienceÒpticaMaterialsdescription
A rigorous Surface Impedance (SI) formulation for planar waveguides is presented. This modal technique splits the modal analysis of the waveguide in two steps. First, we obtain the modes characteristic equations as a function of the SI and, second, we need to obtain the surface impedance values using either analytical or numerical methods. We validate the technique by comparison with well-known analytical cases: the parallel-plate waveguide with losses and the dielectric slab waveguide. Then, we analyze an optical hollow-core waveguide de ned by two high-contrast subwavelength gratings validating our results by comparison with reported values. Finally, we show the potential of our formulation with the analysis of a THz hollow-core waveguide de ned by two surface-relief subwavelength gratings, including material losses in our formulation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-01-01 | IEEE Access |