Cited by 27Terahertz technology and applicationsSpectroscopy Techniques in Biomedical and Chemical ResearchSpectroscopy and Laser Applications

Broadband Terahertz Light–Matter Interaction Enhancement for Precise Spectroscopy of Thin Films and Micro-Samples

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Peretti, Romain, Braud, Flavie, Peytavit, Emilien, Dubois, Emmanuel, Lampin, Jean-François·2018·Photonics

Published version of a preprint

Abstract

In biology, molecules and macromolecules such as sugars, proteins, DNA, RNA, etc., are of utmost importance. Detecting their presence as well as getting information on their actual structure is still a challenge in many cases. The vibrational states of such molecules correspond to a spectral range extending from infrared to terahertz. Spectroscopy is used for the detection and the identification of such compounds and their structure. Terahertz spectroscopy of a biosample is challenging for two main reasons: the high terahertz absorption by water molecules in the sample; and the small size of the sample—its volume is usually smaller than the cube of the terahertz wavelength, thus the light–matter interaction is extremely reduced. In this paper, we present the design, fabrication, characterization, and first typical use of a biophotonic device that aims to increase the light–matter interaction to enable terahertz spectroscopy of very small samples over a broad band (0.2–2 THz). Finally, we demonstrate the validity of our approach by time-domain spectroscopy of samples of a few µL.

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  1. Ramo, S.; Whinnery, J.R.; Van Duzer, T. Fields and Waves in Communication Electronics; John Wiley & Sons: Hoboken, NJ, USA, 2008.

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Authors
Peretti, R., Braud, F., Peytavit, E., Dubois, E., & Lampin, J.-F.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Peretti, Romain
Venue
Photonics
Publisher
MDPI AG
Published
2018-05-17
Volume
5
Issue
2
Pages
11
ISSN
2304-6732 (ISSN-L)
OpenAlex
W2788506347
Cited by
27
References
37
Citations by year
2025: 2 · 2024: 1 · 2023: 6 · 2022: 3 · 2021: 1 · 2020: 5 · 2019: 5 · 2018: 4
FWCI
1.44
Type
journal article
Language
en
Open access
Locations
  • Photonics (publishedVersion, cc-by)
  • Preprints.org (acceptedVersion, cc-by)
  • HAL (submittedVersion, cc-by)
Funders
  • ANR (11-EQPX-0015, ANR-11-EQPX-0025)
  • région hauts de France (Thotrov)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
Keywords
terahertz spectroscopy, light-matter interaction enhancement, thin films, water absorption, time-domain spectroscopy, biosamples, vibrational spectroscopy

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