Analysis of terahertz spectra of water and NaCl solutions obtained in attenuated total reflectance configuration

Arturo Mendoz-Galván; Manuel Alejandro Justo Guerrero; Elodie Strupiechonski

doi:10.1117/12.2681947

4 October 2023 Analysis of terahertz spectra of water and NaCl solutions obtained in attenuated total reflectance configuration

Arturo Mendoz-Galván, Manuel Alejandro Justo Guerrero, Elodie Strupiechonski

Author Affiliations +

Proceedings Volume 12683, Terahertz Emitters, Receivers, and Applications XIV; 126830H (2023) https://doi.org/10.1117/12.2681947
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

This research addresses the complex issues encountered when studying biological and chemical samples in the terahertz (THz) range, mainly due to water's high absorption properties. Using THz-Attenuated Total Reflectance (ATR) spectroscopy, we investigate water and NaCl solutions and provide both experimental data and a comprehensive interpretation of the optical phenomena observed. . Our focus lies in understanding the changes in ATR responses in the THz range for solutions in both bulk and thin film forms, using a non-linear regression analysis of effective optical functions. Moving beyond the traditional low-absorption limit, our study highlights the need for precise equations. We further reveal the significant impact on the optical constants n and k of solutions when NaCl is introduced, offering valuable insights for interpreting spectral data for lossy samples using ATR. Our work seeks to deepen understanding and encourage further research of biological and chemical solutions at THz frequencies.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Arturo Mendoz-Galván, Manuel Alejandro Justo Guerrero, and Elodie Strupiechonski "Analysis of terahertz spectra of water and NaCl solutions obtained in attenuated total reflectance configuration", Proc. SPIE 12683, Terahertz Emitters, Receivers, and Applications XIV, 126830H (4 October 2023); https://doi.org/10.1117/12.2681947

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