TY - JOUR
T1 - Terahertz imaging with a time-reversed finite difference time-domain method
AU - Bardak, Cemile
AU - Zhu, Yanhan
AU - Bernussi, Ayrton A.
AU - Saed, Mohammad
PY - 2014/3
Y1 - 2014/3
N2 - A novel approach to three-dimensional terahertz (THz) imaging based on a time-reversed finite difference time-domain (FDTD) method is presented. Time-reversed convolutional perfectly matching layers (CPML) were implemented as boundaries to truncate the simulation domain. The proposed computationally efficient technique is capable of producing detailed images using a much smaller set of measured data compared to conventional terahertz imaging methods. A coarser grid of transmitter/receiver locations is needed, saving significant data acquisition time. Transmission and reflection imaging configurations in far-field were investigated. Simulations as well as experimental results, including comparisons with conventional methods, are presented. Our approach was validated experimentally using a time-domain terahertz measurement system.
AB - A novel approach to three-dimensional terahertz (THz) imaging based on a time-reversed finite difference time-domain (FDTD) method is presented. Time-reversed convolutional perfectly matching layers (CPML) were implemented as boundaries to truncate the simulation domain. The proposed computationally efficient technique is capable of producing detailed images using a much smaller set of measured data compared to conventional terahertz imaging methods. A coarser grid of transmitter/receiver locations is needed, saving significant data acquisition time. Transmission and reflection imaging configurations in far-field were investigated. Simulations as well as experimental results, including comparisons with conventional methods, are presented. Our approach was validated experimentally using a time-domain terahertz measurement system.
KW - Finite difference time-domain (FDTD)
KW - image reconstruction
KW - terahertz (THz) imaging
KW - time reversal
UR - http://www.scopus.com/inward/record.url?scp=84897024328&partnerID=8YFLogxK
U2 - 10.1109/TTHZ.2014.2303788
DO - 10.1109/TTHZ.2014.2303788
M3 - Article
AN - SCOPUS:84897024328
SN - 2156-342X
VL - 4
SP - 240
EP - 246
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
IS - 2
M1 - 6742624
ER -