Enhanced Analysis of Multiconductor Nanostructured Devices via a Compact Block FDTD/VFETD Method

A reduced-order modeling FDTD/vector finite-element time-domain technique is introduced in this paper, for the rigorous and cost-effective study of multiconductor nanoscale structures. The new methodology blends a compact stencil-optimized discretization process with general vector finite elements via the pertinent coupling conditions and divides the domain into tightly coupled blocks. A key asset is that both approaches are time advanced independently while their state-space models are derived via a Krylov-based scheme with scaled Laguerre functions, which drastically decreases the order of the transfer matrix. Therefore, complex geometries are consistently treated without the need of excessively fine grid tessellations. Numerical results from various nanocomposite devices validate the hybrid method and reveal its applicability.