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This article is cited in 5 scientific papers (total in 5 papers)
Photonics
Sensitivity of reflecting terahertz sensors of aqueous solutions
A. B. Sotskia, M. M. Nazarovb, S. S. Mikheeva, L. I. Sotskayac a Mogilev State A. A. Kuleshov University
b National Research Centre "Kurchatov Institute", Moscow
c Belarusian-Russian University, Mogilev, Belarus
Abstract:
Sensitivity of sensors of the composition of aqueous solutions in which it is detected the terahertz pulse reflected from the dielectric film – solution structure is investigated. It is shown that the maximum of the sensitivity is achieved by choosing the angles of incidence and radiation frequencies, providing zero reflection of monochromatic radiation from the named dissipative structure. Conditions for the realization of such reflection for waves of $s$- and $p$-polarization are established. Calculations are confirmed experimentally for the sensor of glucose concentration in water, which uses a thin silicon wafer, separating solution from air. It is shown that with the use of the terahertz time-domain spectroscopy method the sensor of the proposed structure allows reliable to detect and distinguich glucose impurities of concentration 10 and 30 g/l.
Keywords:
terahertz sensor of solution, Brewster's law, Zenneck's mode, terahertz time domain spectroscopy, concentration of glucose in aqueous solution.
Received: 11.06.2020 Revised: 22.07.2020 Accepted: 19.08.2020
Citation:
A. B. Sotski, M. M. Nazarov, S. S. Mikheev, L. I. Sotskaya, “Sensitivity of reflecting terahertz sensors of aqueous solutions”, Zhurnal Tekhnicheskoi Fiziki, 91:2 (2021), 315–325; Tech. Phys., 66:2 (2021), 305–315
Linking options:
https://www.mathnet.ru/eng/jtf5086 https://www.mathnet.ru/eng/jtf/v91/i2/p315
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