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Sensing the hygroscopicity of polymer and copolymer materials using terahertz time-domain spectroscopy
Jegathisvaran Balakrishnan1, Bernd M Fischer, Derek Abbott
1Centre for Biomedical Engineering and School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia. jega@eleceng.adelaide.edu.au
Abstract:
We present the hygroscopicity of polymer and copolymer materials in the low terahertz (THz) frequency range using a linear absorption model. We identify COC 6013 and COC 5013 as optimal THz window materials, possessing both low hygroscopicity and high transmission in the THz regime. The correct choice of window material is of significance for transmission THz spectroscopy and of particular interest for THz liquid spectroscopy.
