A Terahertz Radiation Linear Polarizer Based on Using a Magnetic Fluid in an External Magnetic Field

Alexey P. Votintsev, Alexey V. Borisov, Zakhar S. Kochnev, Igor Meglinski, Yury V. Kistenev

Research output: Contribution to journalArticlepeer-review


A model of a magnetically controlled linear polarizer of terahertz (THz) waves based on a cell filled with a magnetic fluid and controlled by an external magnetic field was proposed. The magnetic fluid consisted of a synthetic oil with high transparency in the THz range and ferromagnetic alloy microparticles. Selection of the ferromagnetic particles size and concentration, and also parameters of the external magnetic field was conducted. It was shown that when using ferromagnetic particles of 10–35 μm size, a concentration of 10 wt.%, and a magnetic field with induction of 6.7–57.2 mT, the created construction works as a linear polarizer of the THz wave in the ranged from 0.3 to 1.5 THz, with the degree of polarization of the initially non-polarized THz wave transmitted through the cell being at least of 80%.
Original languageEnglish
Article number675
Pages (from-to)675
Number of pages1
Issue number6
Early online date11 Jun 2023
Publication statusPublished - Jun 2023

Bibliographical note

Copyright © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Funding Information: The research was supported by the Grant of the Russian Ministry of Science and Education (Agreement No. 075-15-2021-1412 dated 23 December 2021, unique contract identifier RF 2251.62321X0012)


  • Radiology, Nuclear Medicine and imaging
  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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