Abstract
Abstract
Terahertz time-domain spectroscopy (THz-TDS) provides a non-contact, non-destructive method for evaluating different materials and their properties. This short review discusses the commonly used numerical models for the non-destructive estimation of thickness, refractive index, surface and interface roughness of paints, thermal barrier coatings, and polymer coatings using THz-TDS in the reflection geometry. To demonstrate the applicability of these models, we used paint layers on metallic substrates and extracted different paraments by fitting the experimental THz-TDS data. We conclude by discussing further steps to improve the efficiency of the fitting procedure used to extract the layer parameters.
Funder
Science and Engineering Research Board
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Reference63 articles.
1. Cutting-edge terahertz technology;Tonouchi;Nat. Photon.,2007
2. Perspective: terahertz science and technology;Mittleman;J. Appl. Phys.,2017
3. Quantitative measurement of laminar material properties and structure using time domain reflection imaging;Zimdars,2008
4. Pulsed-terahertz reflectometry for health monitoring of ceramic thermal barrier coatings;Chen;Opt. Express,2010
5. NDT of layered structures using pulse-thermography and THz-TDS imaging;Frisch,2018
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献