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Full-wave MoM solver for Carbon Nanotubes Embedded in Dielectric Slab-SDEY-06-22-21-Preprint.pdf (1.16 MB)

Method of Moment Analysis of Carbon Nanotubes Embedded in A Lossy Dielectric Slab Using A Multilayer Dyadic Green’s Function

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posted on 29.06.2021, 00:58 by SUMITRA DEY, Deb chatterjee, Edward Garboczi, Ahmed M. Hassan
Modeling the electromagnetic response of carbon nanotube (CNT) reinforced composites is inherently a three dimensional (3D) multi-scale problem that is challenging to solve in real-time for nondestructive evaluation applications. This article presents a fast and accurate full-wave electromagnetic solver based on a multi-layer dyadic Green’s function approach. In this approach, we account for the effects of the dielectric slab, where the CNTs are embedded, without explicitly discretizing its interfaces. Due to their large aspect ratios, the CNTs are modeled as arbitrary thin wires (ATWs), and the method of moment (MoM) formulation with distributed line impedance is used to solve for their coupled currents. The accuracy of the inhouse solver is validated against commercial method of moment (MoM) and finite element method (FEM) solvers over a broad range of frequencies (from 1 GHz to 10 THz) and for a wide range of dielectric slab properties. Examples of 100nm long vertical and horizontal CNTs embedded in a 1 μm thick lossy dielectric substrate are presented. The in-house solver provides more than 50 ✕ speed up while solving the vertical CNT, and more than 570 ✕ speed up while solving the horizontal CNT than a commercial MoM solver over the GHz to THz frequency range.

Funding

This work was supported in part by the NIST grant # 70NANB15H285 titled “Multi-Scale Computational Modeling of Carbon Nanostructure Composites” and in part by NSF CRI Award # 1629908 “II-NEW: Experimental Characterization and CAD Development Testbed for Nanoscale Integrated Circuits.”

History

Email Address of Submitting Author

sumitra.dey@mail.umkc.edu

ORCID of Submitting Author

0000-0003-3852-5489

Submitting Author's Institution

University of Missouri Kansas City

Submitting Author's Country

United States of America