Terahertz imaging with a time-reversed finite difference time-domain method

Cemile Bardak, Yanhan Zhu, Ayrton A. Bernussi, Mohammad Saed

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

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.

Original languageEnglish
Article number6742624
Pages (from-to)240-246
Number of pages7
JournalIEEE Transactions on Terahertz Science and Technology
Volume4
Issue number2
DOIs
StatePublished - Mar 2014

Keywords

  • Finite difference time-domain (FDTD)
  • image reconstruction
  • terahertz (THz) imaging
  • time reversal

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