Applied Physics B

, Volume 68, Issue 6, pp 1085–1094

Recent advances in terahertz imaging

  • D.M. Mittleman
  • M. Gupta
  • R. Neelamani
  • R.G. Baraniuk
  • J.V. Rudd
  • M. Koch
Invited paper

DOI: 10.1007/s003400050750

Cite this article as:
Mittleman, D., Gupta, M., Neelamani, R. et al. Appl Phys B (1999) 68: 1085. doi:10.1007/s003400050750

Abstract.

We review recent progress in the field of terahertz “T-ray” imaging. This relatively new imaging technique, based on terahertz time-domain spectroscopy, has the potential to be the first portable far-infrared imaging spectrometer. We give several examples which illustrate the possible applications of this technology, using both the amplitude and phase information contained in the THz waveforms. We describe the latest results in tomographic imaging, in which waveforms reflected from an object can be used to form a three-dimensional representation. Advanced signal processing tools are exploited for the purposes of extracting tomographic results, including spectroscopic information about each reflecting layer of a sample. We also describe the application of optical near-field techniques to the THz imaging system. Substantial improvements in the spatial resolution are demonstrated.

PACS: 07.57.Pt; 42.65.Re

Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • D.M. Mittleman
    • 1
  • M. Gupta
    • 1
  • R. Neelamani
    • 1
  • R.G. Baraniuk
    • 1
  • J.V. Rudd
    • 2
  • M. Koch
    • 3
  1. 1.Electrical and Computer Engineering Department, Rice University, MS-366, 6100 Main St., Houston, TX 77005, USA (Fax: +1-713/524-5237, E-mail: daniel@rice.edu)US
  2. 2.Picometrix, Inc., P.O. Box 130243, Ann Arbor, MI 48113, USAUS
  3. 3.Institut für Hochfrequenztechnik, Schleinitzstr. 22, Technical University of Braunschweig, D-38106 Braunschweig, GermanyDE