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Proceedings Paper

Aperture-less terahertz near-field imaging
Author(s): William E. Baughman; Zachary Smithson; Mathieu Baker; David S. Wilbert; Patrick Kung; Seongsin M. Kim
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Paper Abstract

Terahertz based spectroscopy and imaging has become an active field of research in the past decade for a plethora of applications including security screening, biomedical imaging, chemical analysis, and investigation of carrier dynamics. Several advantages exist for the use of THz techniques since investigation of a sample can be performed without contact or ionization; however, fine detail is difficult to determine due to the diffraction limit of the radiation. The resolution limit of THz imaging and sensing can be overcome by the incorporation of near-field optical techniques; which can allow image resolution as fine as tens of nanometers at THz frequencies. With this expanded resolution capability, THz imaging can decipher micro- and nano-structural information which, when coupled with the non-contact features of these techniques, makes THz spectroscopy ideal for the analysis micro and nano-optical devices. In this study, we demonstrate the development and performance of an aperture-less near-field system which has been integrated to perform highly-spatially resolved Terahertz Time-Domain Spectroscopic (THz-TDS) imaging.

Paper Details

Date Published: 23 February 2013
PDF: 7 pages
Proc. SPIE 8585, Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications, 858510 (23 February 2013); doi: 10.1117/12.2005688
Show Author Affiliations
William E. Baughman, Univ. of Alabama (United States)
Zachary Smithson, Univ. of Alabama (United States)
Mathieu Baker, Univ. of Alabama (United States)
David S. Wilbert, Univ. of Alabama (United States)
Patrick Kung, Univ. of Alabama (United States)
Seongsin M. Kim, Univ. of Alabama (United States)

Published in SPIE Proceedings Vol. 8585:
Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications
Gerald J. Wilmink; Bennett L. Ibey, Editor(s)

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