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Updated: May 31, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

Terahertz Magnon-Polariton Control Using a Tunable Liquid Crystal Cavity.

Dmitriy Yavorskiy^1,2,3, Jan Suffczyński⁴, Rafał Kowerdziej⁵

¹Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warsaw, Poland.

|December 22, 2025

Summary

This summary is machine-generated.

Researchers demonstrate electrical control of terahertz magnon-polaritons using liquid crystals. This voltage-driven tuning of antiferromagnetic magnon-polaritons offers a pathway for faster, non-dissipative data processing.

Keywords:

THz antiferromagnetism liquid crystals magnon-polaritons magnons strong coupling

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Area of Science:

Spintronics
Quantum Optics
Materials Science

Background:

Magnon-polaritons, hybrid light-matter excitations in antiferromagnets, are promising for terahertz (THz) data manipulation.
Controlling THz magnon-polaritons electrically, without energy loss, is a significant challenge.
Existing ferromagnetic magnon-polaritons operate at slower GHz frequencies.

Purpose of the Study:

To demonstrate remote electrical control of antiferromagnetic magnon-polaritons at room temperature.
To explore voltage-driven tuning of magnon-photon hybridization.
To enable non-dissipative control for future magnonic devices.

Main Methods:

Integrated a liquid crystal layer into a THz Fabry-Perot cavity containing an antiferromagnetic crystal.
Utilized the liquid crystal's tunable dielectric constant to modify the cavity's photonic environment.
Observed the effect of electrical field on vacuum Rabi oscillations and magnon-photon coupling.

Main Results:

Achieved remote electrical control of antiferromagnetic magnon-polaritons several millimeters away from the magnetic material.
Demonstrated reversible tuning of magnon-photon hybridization via electrical field.
Showcased control without direct electrical contact or altering the antiferromagnetic medium.

Conclusions:

Developed a method for voltage-programmable terahertz magnonic devices.
Opened new avenues for non-invasive control strategies in spin-based information processing.
Paved the way for efficient THz data manipulation using antiferromagnetic magnon-polaritons.