Improved sample characterization in terahertz reflection imaging and spectroscopy
Open accessAbstract
For imaging applications involving biological subjects, the strong attenuation of terahertz radiation by water means that terahertz pulsed imaging is most likely to be successfully implemented in a reflection geometry. Many terahertz reflection geometry systems have a window onto which the sample is placed - this window may introduce unwanted reflections which interfere with the reflection of interest from the sample. In this paper we derive a new approach to account for the effects of these reflections and illustrate its success with improved calculations of sample optical properties.
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Self-referencing methods rely on accurate knowledge of the substrate and make assumptions about sample geometry such as the absence of air gaps, which can introduce systematic errors during data postprocessing.
“However, such methods rely on accurate knowledge of the substrate and make assumptions about sample geometry such as the absence of air gaps, which can introduce systematic errors during data postprocessing.”
From Dual-Beam THz Spectrometer with Low-Aberration Optics and Off-Axis Multipixel Photoconductive Emitters for Reduced Systematic Errors (2025) · cites this paper as [8]
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Terahertz time-domain spectroscopy
Koch, M., Mittleman, D. M., Ornik, J., & Castro-Camus, E. (2023) · Nature Reviews Methods Primers · doi:10.1038/s43586-023-00232-z · Cited by 410 · see citing works
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Chopra, N., & Lloyd-Hughes, J. (2025) · ACS Photonics · doi:10.1021/acsphotonics.4c01934 · Cited by 8 · see citing works
- Authors
- Huang, S., Ashworth, P. C., Kan, K. W., Chen, Y., Wallace, V. P., Zhang, Y.-T., & Pickwell-MacPherson, E.
- Affiliations
- University of Cambridge (GB)
- Chinese University of Hong Kong (HK)
- The University of Western Australia (AU)
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2009-02-26
- Volume
- 17
- Issue
- 5
- Pages
- 3848
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W1994677617
- Cited by
- 96
- References
- 20
- Citations by year
- 2026: 2 · 2025: 4 · 2023: 3 · 2022: 9 · 2021: 5 · 2020: 8 · 2019: 6 · 2018: 3 · 2017: 6 · 2016: 11 · 2015: 8 · 2014: 4 · 2013: 6 · 2012: 5
- FWCI
- 5.55
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- UWA Profiles and Research Repository (UWA) (submittedVersion)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- Funders
- Hong Kong Government
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Physical Sciences › Engineering › Biomedical Engineering › Optical Coherence Tomography Applications
- Keywords
- terahertz reflection imaging, terahertz spectroscopy, sample characterization, water attenuation, biological specimen, reflection geometry
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