Journal
INFRARED PHYSICS & TECHNOLOGY
Volume 88, Issue -, Pages 139-143Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.infrared.2017.11.026
Keywords
Terahertz spectroscopy; Dodecanoic acid; Granular scattering; Terahertz filter
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Funding
- Ministry of Science, FP7 Information and Communication Technologies & Future Planning [E0142105-04]
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We experimentally investigated terahertz (THz) filters fabricated using dodecanoic acid (DDA) particles and polyethylene (PE) by performing THz time-domain spectroscopy. Since the refractive indices of DDA and PE are the same in the THz range, no optical scattering occurred when they were mixed. However, heating caused air voids to replace the DDA particles, and the DDA melted into the spaces between the PE particles. Furthermore, as the DDA particle size, heating time, and DDA content increased, the THz band width became narrower. Based on the results, we propose a new, low-cost type of THz filter with a simple manufacturing method. (C) 2017 Elsevier B.V. All rights reserved.
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