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Photonics 2018, 5(4), 58;

Terahertz Polarization Imaging and Its Applications

Faculty of Science and Technology, Department of Physics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
Received: 27 October 2018 / Revised: 30 November 2018 / Accepted: 6 December 2018 / Published: 12 December 2018
(This article belongs to the Special Issue Terahertz Photonics)
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This review focuses on several recent research activities regarding precise and fast polarization-sensitive terahertz time-domain spectroscopy systems for imaging purposes, and explains three interesting application examples. Owing to modulation techniques that have recently been developed for the evaluation of the instantaneous terahertz electric-field (E-field) vector, fast and precise terahertz polarization imaging becomes feasible. This terahertz technology enables high-resolution surface topography, precise understanding of the spatial E-field vector distribution of the focused terahertz pulse, and examination of strain-induced birefringence in polymeric materials. These examples constitute a new application area of terahertz photonics with emphasis on both fundamental optics and industrial applications. View Full-Text
Keywords: terahertz spectroscopy; polarization; topography; parabolic mirror; birefringence terahertz spectroscopy; polarization; topography; parabolic mirror; birefringence

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Watanabe, S. Terahertz Polarization Imaging and Its Applications. Photonics 2018, 5, 58.

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