University of Oulu

Votintsev AP, Borisov AV, Kochnev ZS, Meglinski I, Kistenev YV. A Terahertz Radiation Linear Polarizer Based on Using a Magnetic Fluid in an External Magnetic Field. Photonics. 2023; 10(6):675.

A terahertz radiation linear polarizer based on using a magnetic fluid in an external magnetic field

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Author: Votintsev, Alexey P.1; Borisov, Alexey V.1; Kochnev, Zakhar S.1;
Organizations: 1Laboratory of Biophotonics, National Research Tomsk State University, Tomsk 634050, Russia
2Information Technology and Electrical Engineering, University of Oulu, 900014 Oulu, Finland
3College of Engineering and Physical Sciences, Aston University, Birmingham B4 7ET, UK
4V.E. Zuev Institute of Atmospheric Optics SB RAS, Tomsk 634055, Russia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 6.8 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2023
Publish Date: 2023-09-06


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%.

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Series: Photonics
ISSN: 2304-6732
ISSN-E: 2304-6732
ISSN-L: 2304-6732
Volume: 10
Issue: 6
Article number: 675
DOI: 10.3390/photonics10060675
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: 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).
Copyright information: © 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 (