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Proceedings Paper

Terahertz time-domain polarimetry for generalized anistropic and chiral materials
Author(s): Gong Cheng; Won Jin Choi; Hee-Jeong Jang; Nicholas A. Kotov; Theodore B. Norris
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Paper Abstract

We have developed two terahertz (THz) polarimetric methodologies based on terahertz time-domain spectroscopy (THz- TDS) incorporating three wire-grid polarizers. They require no change to existing THz-TDS setups and are free of any complicated electronic controls and synchronizations. In addition to the standard quantities measured by THz-TDS such as transmission and optical constants, they provide complete information on the anisotropy and chirality for a generalized material through measurements of the full electric field vector and hence the Jones matrix, and calculating specific quantities. Thus terahertz time-domain polarimetry (THz-TDP) can be considered as an upgrade of the conventional THz- TDS, needed for full characterization of anisotropic and chiral materials. In this paper, we describe the details of the experimental settings, mathematical procedures and property quantifications in these methodologies. We present experimental results on an anisotropic polymer sheet showing the effectiveness of the methods, and preliminary data for chiral DNA molecules for the first time in the THz frequency range.

Paper Details

Date Published: 13 March 2019
PDF: 11 pages
Proc. SPIE 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII, 1091704 (13 March 2019); doi: 10.1117/12.2516383
Show Author Affiliations
Gong Cheng, Univ. of Michigan (United States)
Won Jin Choi, Univ. of Michigan (United States)
Hee-Jeong Jang, Univ. of Michigan (United States)
Nicholas A. Kotov, Univ. of Michigan (United States)
Theodore B. Norris, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 10917:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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