A Novel Method of Terahertz Spectroscopy and Imaging in Reflection Geometry

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Abstract:

In reflection geometry of terahertz spectroscopy, the biological sample is usually placed on a sample window. This paper presents a novel method for eliminating the effect of the ringing, i.e., the interference between reflections of the reference and the sample, and from the air‐window and sample‐window interfaces, respectively. In the proposed method, a special thickness of substrate is designed to acquire an accurate reference reflection. The reflections of the samples of deionized water and ethanol were examined, and the calculation of optical properties of the samples by using our proposed method agrees with standard data. The main advantages of this method are simplicity, accuracy, and ease of application for reflection systems with different incident angles.

Keywords: Baseline; Terahertz pulsed transmission spectroscopy (TPS); Terahertz time‐domain spectroscopy (THz‐TDS)

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/12-06713

Affiliations: State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Publication date: January 1, 2013

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