High precision dual-modulation differential terahertz ATR sensor for liquid measurements

Xiujun Zheng; Thomas Gevart; Guilhem Gallot

doi:10.1364/OL.430324

High precision dual-modulation differential terahertz ATR sensor for liquid measurements

Xiujun Zheng
, Thomas Gevart
, Guilhem Gallot

Institut Polytechnique de Paris

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

We describe a highly sensitive and stable quantum-cascade-laser-based attenuated total reflection (ATR) terahertz sensor for the detection of very low concentration solutions, using a dual-modulation differential approach and ATR geometry. This sensor offers a very high dynamic range and a long-term stability of 40 dB, which extends the potential of terahertz radiation for the analysis of liquid and biological samples. The performance is illustrated by measurements on standard solutions of ions, sugars, and proteins, for concentrations down to 1 µM.

langue originale	Anglais
Pages (de - à)	4045-4048
Nombre de pages	4
journal	Optics Letters
Volume	46
Numéro de publication	16
Les DOIs	https://doi.org/10.1364/OL.430324
état	Publié - 15 août 2021

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10.1364/OL.430324

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abstract = "We describe a highly sensitive and stable quantum-cascade-laser-based attenuated total reflection (ATR) terahertz sensor for the detection of very low concentration solutions, using a dual-modulation differential approach and ATR geometry. This sensor offers a very high dynamic range and a long-term stability of 40 dB, which extends the potential of terahertz radiation for the analysis of liquid and biological samples. The performance is illustrated by measurements on standard solutions of ions, sugars, and proteins, for concentrations down to 1 µM.",

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AB - We describe a highly sensitive and stable quantum-cascade-laser-based attenuated total reflection (ATR) terahertz sensor for the detection of very low concentration solutions, using a dual-modulation differential approach and ATR geometry. This sensor offers a very high dynamic range and a long-term stability of 40 dB, which extends the potential of terahertz radiation for the analysis of liquid and biological samples. The performance is illustrated by measurements on standard solutions of ions, sugars, and proteins, for concentrations down to 1 µM.

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High precision dual-modulation differential terahertz ATR sensor for liquid measurements

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