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Accurate and Numerically Stable FDTD Modeling of Human Skin Tissues in THz Band
- Authors
- Park, Jaesun; Baek, Jae-Woo; Jung, Kyung-Young
- Issue Date
- Apr-2022
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Time-domain analysis; Numerical models; Finite difference methods; Dispersion; Skin; Numerical stability; Skin cancer; Dispersion model; dispersive media; finite-difference time-domain (FDTD) method; human skin tissues; terahertz (THz)
- Citation
- IEEE ACCESS, v.10, pp.41260 - 41266
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ACCESS
- Volume
- 10
- Start Page
- 41260
- End Page
- 41266
- ISSN
- 2169-3536
- Abstract
- We propose finite-difference time-domain (FDTD) modeling suitable for healthy skin, basal cell carcinoma, dysplastic pigmentary nevus, and non-dysplastic pigmentary nevus in the frequency range of 0.25 THz to 1.05 THz. Toward this purpose, we utilize the complex-conjugate pole-residue (CCPR) dispersion model, because it is very simple to extract the accurate CCPR coefficients using the powerful vector fitting tool. In the FDTD method, it is of great importance to check the numerical stability conditions. If the coefficients extracted through the vector fitting tool do not satisfy the numerical stability conditions, the particle swarm optimization (PSO) algorithm is employed to obtain the accurate and numerically stable coefficients. Numerical examples are provided to validate our proposed FDTD modeling.
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Related Researcher
- Jung, Kyung Young
- COLLEGE OF ENGINEERING (SCHOOL OF ELECTRONIC ENGINEERING)