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Authors: Gueckstock, Oliver
Nádvorník, Lukáš
Seifert, Tom S.
Borchert, Martin
Jakob, Gerhard
Schmidt, Georg
Woltersdorf, Georg
Kläui, Mathias
Wolf, Martin
Kampfrath, Tobias
Title: Modulating the polarization of broadband terahertz pulses from a spintronic emitter at rates up to 10 kHz
Online publication date: 17-Sep-2021
Language: english
Abstract: Reliable modulation of terahertz electromagnetic waveforms is important for many applications. Here, we rapidly modulate the direction of the electric field of linearly polarized terahertz electromagnetic pulses with 1-30 THz bandwidth by applying time-dependent magnetic fields to a spintronic terahertz emitter. Polarity modulation of the terahertz field with more than 99% contrast at a rate of 10 kHz is achieved using a harmonic magnetic field. By adding a static magnetic field, we modulate the direction of the terahertz field between angles of, for instance, -53 degrees and 53 degrees at kilohertz rates. We believe our approach makes spintronic terahertz emitters a promising source for low-noise modulation spectroscopy and polarization-sensitive techniques such as ellipsometry at 1-30 THz.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: CC BY
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Journal: Optica
Pages or article number: 1013
Publisher: OSA
Publisher place: Washington, DC
Issue date: 2021
ISSN: 2334-2536
Publisher URL:
Publisher DOI: 10.1364/OPTICA.430504
Appears in collections:JGU-Publikationen

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