Liquid water absorption is one of the most enduring problems facing THz imaging and spectroscopy in biomedical applications. The absorption coefficient for liquid water shows a very high THz absorption, 200 cm1 at 1 THz [1]. This strong absorption is a big hurdle for T-ray spectroscopy and imaging of liquid or even wet samples [2]. This paper proposes a novel method for parameter extraction of a liquid, using a double modulated differential time-domain spectroscopy (DTDS) technique with dual-thickness measurement. The proposed technique improves on the previous work by replacing the required sample dithering technique [3] with a rotating spinning wheel resulting in an improved noise performance up to two orders of magnitude.
Novel T-ray Liquid Spectroscopy via Double Modulated Differential Time-Domain Spectroscopy
2006-09-01
1239555 byte
Conference paper
Electronic Resource
English
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