CONFERENCE PROCEEDINGS
Advanced Search
Home > Journals > Opt. Eng. > Volume 54 > Issue 5 > Article
Open Access
21 May 2015 Spectroscopic study of terahertz reflection and transmission properties of carbon-fiber-reinforced plastic composites
Jin Zhang, Changcheng Shi, Yuting Ma, Xiaohui Han, Wei Li, Tianying Chang, Dongshan Wei, Chunlei Du, Hong-Liang Cui
Author Affiliations +
Optical Engineering, Vol. 54, Issue 5, 054106 (May 2015). https://doi.org/10.1117/1.OE.54.5.054106
Abstract
Carbon-fiber-reinforced plastic (CFRP) composites are widely used in aerospace and concrete structure reinforcement due to their high strength and light weight. Terahertz (THz) time-domain spectroscopy is an attractive tool for defect inspection in CFRP composites. In order to improve THz nondestructive testing of CFRP composites, we have carried out systematic investigations of THz reflection and transmission properties of CFRP. Unidirectional CFRP composites with different thicknesses are measured with polarization directions 0 deg to 90 deg with respect to the fiber direction, in both reflection and transmission modes. As shown in the experiments, CFRP composites are electrically conducting and therefore exhibit a high THz reflectivity. In addition, CFRP composites have polarization-dependent reflectivity and transmissivity for THz radiation. The reflected THz power in the case of parallel polarization is nearly 1.8 times higher than for perpendicular polarization. At the same time, in the transmission of THz wave, a CFRP acts as a Fabry–Pérot cavity resulting from multiple internal reflections from the CFRP–air interfaces. Moreover, from the measured data, we extract the refractive index and absorption coefficient of CFRP composites in the THz frequency range.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
Citation Download Citation
Jin Zhang, Changcheng Shi, Yuting Ma, Xiaohui Han, Wei Li, Tianying Chang, Dongshan Wei, Chunlei Du, and Hong-Liang Cui "Spectroscopic study of terahertz reflection and transmission properties of carbon-fiber-reinforced plastic composites," Optical Engineering 54(5), 054106 (21 May 2015). https://doi.org/10.1117/1.OE.54.5.054106
Published: 21 May 2015
JOURNAL ARTICLE
 7 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Lens.org Logo
CITATIONS
Cited by 26 scholarly publications.
Advertisement
Advertisement
KEYWORDS
Terahertz radiation
Composites
Refractive index
Spectroscopy
Terahertz spectroscopy
Reflection
Reflectivity
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top