Modified Martin-Puplett interferometer for magneto-optical Kerr effect measurements at sub-THz frequencies

We present magneto-optical Kerr effect (MOKE) spectrometer based on a modified Martin-Puplett interferometer, utilizing continuous wave sub-THz low-power radiation in broad frequency range. This spectrometer is capable of measuring the frequency dependence of the MOKE response function, both the Ker...

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Published in:arXiv.org 2024-07
Main Authors: A Glezer Moshe, Nagarajan, R, Nagel, U, Rõõm, T, Blumberg, G
Format: Article
Language:English
Subjects:
Continuous radiation
Electron gas
Ellipticity
Frequency ranges
Interferometers
Kerr magnetooptical effect
Magnets
Response functions
Terahertz frequencies
Unconventional superconductors
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Nagarajan, R
Nagel, U
Rõõm, T
Blumberg, G
description We present magneto-optical Kerr effect (MOKE) spectrometer based on a modified Martin-Puplett interferometer, utilizing continuous wave sub-THz low-power radiation in broad frequency range. This spectrometer is capable of measuring the frequency dependence of the MOKE response function, both the Kerr rotation and ellipticity, simultaneously with sub-milliradian accuracy without the need for reference measurement. The instrument's versatility allow it to be coupled to a cryostat with optical windows enabling studies of a variety of quantum materials such as unconventional superconductors, two-dimensional electron gas systems, quantum magnets, and other system showing optical Hall response, at sub-Kelvin temperatures and in high magnetic fields. We demonstrate the functionality of the MOKE spectrometer using an undoped InSb wafer as a test sample.
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subjects Continuous radiation
Electron gas
Ellipticity
Frequency ranges
Interferometers
Kerr magnetooptical effect
Magnets
Response functions
Terahertz frequencies
Unconventional superconductors
title Modified Martin-Puplett interferometer for magneto-optical Kerr effect measurements at sub-THz frequencies
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