Abstract:
Terahertz reflective imaging is applied to characterize the failure modes in a polymer coating on a steel plate. The coating was initially scratched, then after accelerat...Show MoreMetadata
Abstract:
Terahertz reflective imaging is applied to characterize the failure modes in a polymer coating on a steel plate. The coating was initially scratched, then after accelerated aging, several types of failure have occurred. In order to resolve the thin coating (~50 μm), terahertz frequency-wavelet domain deconvolution is implemented. With the deconvolved signals, the temporally overlapping echoes of the incident, roughly single-cycle terahertz pulse are clearly resolved, and three important failure modes, viz. corrosion, delamination, and blistering, are characterized quantitatively. Terahertz images in three dimensions clearly exhibit the coating thickness distribution across the entire damaged coating, highlighting the terahertz features associated with different failure modes, thus demonstrating that terahertz imaging can be considered as an effective modality for characterizing damage mechanisms in polymer coatings on metals.
Published in: IEEE Journal of Selected Topics in Quantum Electronics ( Volume: 23, Issue: 4, July-Aug. 2017)
Funding Agency:
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
Junliang Dong (S’16) received the M.S. degree in control
science and engineering from Tsinghua University, Beijing, China, in 2011. He is currently working toward the Ph.D.
degree at Georgia Institute of Technology, Atlanta, GA, USA. His research interests include terahertz imaging and
spectroscopy, terahertz optics, and nondestructive testing.
Junliang Dong (S’16) received the M.S. degree in control
science and engineering from Tsinghua University, Beijing, China, in 2011. He is currently working toward the Ph.D.
degree at Georgia Institute of Technology, Atlanta, GA, USA. His research interests include terahertz imaging and
spectroscopy, terahertz optics, and nondestructive testing.View more
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
Alexandre Locquet received the M.S. degree in electrical engineering
from the Faculté Polytechnique de Mons, Mons, Belgium, the Ph.D. degree (doctorat) in engineering science, and
electrical and computer engineering from the Université de Franche-Comté, Besançon, France, and
the Ph.D. degree in electrical and computer engineering from the Georgia Institute of Technology (Georgia Tech),
Atlanta, GA, USA. He is currentl...Show More
Alexandre Locquet received the M.S. degree in electrical engineering
from the Faculté Polytechnique de Mons, Mons, Belgium, the Ph.D. degree (doctorat) in engineering science, and
electrical and computer engineering from the Université de Franche-Comté, Besançon, France, and
the Ph.D. degree in electrical and computer engineering from the Georgia Institute of Technology (Georgia Tech),
Atlanta, GA, USA. He is currentl...View more
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
D. S. Citrin (M’93–SM’03) received the B.A. degree
from Williams College, Williamstown, MA, USA, in 1985, and the M.S. and Ph.D. degrees from the University of Illinois
Champaign, IL, USA, in 1987 and 1991, respectively, all in physics. From 1992 to 1993, he was a Postdoctoral Research
Fellow in the Max Planck Institute for Solid State Research, Stuttgart, Germany, where he was involved in exciton
radiative decay in l...Show More
D. S. Citrin (M’93–SM’03) received the B.A. degree
from Williams College, Williamstown, MA, USA, in 1985, and the M.S. and Ph.D. degrees from the University of Illinois
Champaign, IL, USA, in 1987 and 1991, respectively, all in physics. From 1992 to 1993, he was a Postdoctoral Research
Fellow in the Max Planck Institute for Solid State Research, Stuttgart, Germany, where he was involved in exciton
radiative decay in l...View more
Contents School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
Junliang Dong (S’16) received the M.S. degree in control
science and engineering from Tsinghua University, Beijing, China, in 2011. He is currently working toward the Ph.D.
degree at Georgia Institute of Technology, Atlanta, GA, USA. His research interests include terahertz imaging and
spectroscopy, terahertz optics, and nondestructive testing.
Junliang Dong (S’16) received the M.S. degree in control
science and engineering from Tsinghua University, Beijing, China, in 2011. He is currently working toward the Ph.D.
degree at Georgia Institute of Technology, Atlanta, GA, USA. His research interests include terahertz imaging and
spectroscopy, terahertz optics, and nondestructive testing.View more
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
Alexandre Locquet received the M.S. degree in electrical engineering
from the Faculté Polytechnique de Mons, Mons, Belgium, the Ph.D. degree (doctorat) in engineering science, and
electrical and computer engineering from the Université de Franche-Comté, Besançon, France, and
the Ph.D. degree in electrical and computer engineering from the Georgia Institute of Technology (Georgia Tech),
Atlanta, GA, USA. He is currently a Researcher at the Unité Mixte Internationale, Georgia Tech-CNRS Laboratory,
Georgia Tech Lorraine, Metz, France, and an adjunct Professor in the School of Electrical and Computer Engineering,
Georgia Tech. He has authored or coauthored more than 40 journal publications and conference presentations, and 1 book
chapter. His research interests include semiconductor laser dynamics and chaos, nonlinear time series analysis,
physical-layer security, and terahertz imaging. He is a Member of Eta Kappa Nu, the Optical Society of America, and
the IEEE Photonics Society.
Alexandre Locquet received the M.S. degree in electrical engineering
from the Faculté Polytechnique de Mons, Mons, Belgium, the Ph.D. degree (doctorat) in engineering science, and
electrical and computer engineering from the Université de Franche-Comté, Besançon, France, and
the Ph.D. degree in electrical and computer engineering from the Georgia Institute of Technology (Georgia Tech),
Atlanta, GA, USA. He is currently a Researcher at the Unité Mixte Internationale, Georgia Tech-CNRS Laboratory,
Georgia Tech Lorraine, Metz, France, and an adjunct Professor in the School of Electrical and Computer Engineering,
Georgia Tech. He has authored or coauthored more than 40 journal publications and conference presentations, and 1 book
chapter. His research interests include semiconductor laser dynamics and chaos, nonlinear time series analysis,
physical-layer security, and terahertz imaging. He is a Member of Eta Kappa Nu, the Optical Society of America, and
the IEEE Photonics Society.View more
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, Metz, France
D. S. Citrin (M’93–SM’03) received the B.A. degree
from Williams College, Williamstown, MA, USA, in 1985, and the M.S. and Ph.D. degrees from the University of Illinois
Champaign, IL, USA, in 1987 and 1991, respectively, all in physics. From 1992 to 1993, he was a Postdoctoral Research
Fellow in the Max Planck Institute for Solid State Research, Stuttgart, Germany, where he was involved in exciton
radiative decay in low-dimensional semiconductor structures. Subsequently, from 1993 to 1995, he was a Center Fellow
in the Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, USA, where he studied ultrafast
phenomena in quantum wells. He was then an Assistant Professor of physics with Washington State University, Pullman,
WA, USA from 1995 to 2001. In 2001, he joined the faculty of the Georgia Institute of Technology, where he is
currently a Professor of electrical and computer engineering. In addition, he coordinates the research effort on
nonlinear optics and dynamics with the Unité Mixte Internationale, Georgia Tech-CNRS UMI 2958, Georgia Tech
Lorraine, Metz, France. His research interests include terahertz science and technology, nonlinear dynamics in
external-cavity semiconductor lasers, and nanophotonics. He has served as an Associate Editor of the IEEE Journal
of Quantum Electronics. He received the Presidential Early Career Award for Scientists and
Engineers and the Friedrich Bessel Prize from the Alexandre von Humboldt Stiftung.
D. S. Citrin (M’93–SM’03) received the B.A. degree
from Williams College, Williamstown, MA, USA, in 1985, and the M.S. and Ph.D. degrees from the University of Illinois
Champaign, IL, USA, in 1987 and 1991, respectively, all in physics. From 1992 to 1993, he was a Postdoctoral Research
Fellow in the Max Planck Institute for Solid State Research, Stuttgart, Germany, where he was involved in exciton
radiative decay in low-dimensional semiconductor structures. Subsequently, from 1993 to 1995, he was a Center Fellow
in the Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, MI, USA, where he studied ultrafast
phenomena in quantum wells. He was then an Assistant Professor of physics with Washington State University, Pullman,
WA, USA from 1995 to 2001. In 2001, he joined the faculty of the Georgia Institute of Technology, where he is
currently a Professor of electrical and computer engineering. In addition, he coordinates the research effort on
nonlinear optics and dynamics with the Unité Mixte Internationale, Georgia Tech-CNRS UMI 2958, Georgia Tech
Lorraine, Metz, France. His research interests include terahertz science and technology, nonlinear dynamics in
external-cavity semiconductor lasers, and nanophotonics. He has served as an Associate Editor of the IEEE Journal
of Quantum Electronics. He received the Presidential Early Career Award for Scientists and
Engineers and the Friedrich Bessel Prize from the Alexandre von Humboldt Stiftung.View more
