Modulating the polarization of broadband terahertz pulses from a spintronic emitter at rates up to 10 kHz

Gueckstock O, Nadvornik L, Seifert TS, Borchert M, Jakob G, Schmidt G, Woltersdorf G, Klaeui M, Wolf M, Kampfrath T (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Optica Optical Society of America

Book Volume: 8

Pages Range: 1013-1019

Journal Issue: 7

DOI: 10.1364/OPTICA.430504

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° and 53° 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.

Involved external institutions

Freie Universität Berlin DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Martin-Luther-Universität Halle-Wittenberg (MLU) DE Germany (DE) Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE)

How to cite

APA:

Gueckstock, O., Nadvornik, L., Seifert, T.S., Borchert, M., Jakob, G., Schmidt, G.,... Kampfrath, T. (2021). Modulating the polarization of broadband terahertz pulses from a spintronic emitter at rates up to 10 kHz. Optica, 8(7), 1013-1019. https://doi.org/10.1364/OPTICA.430504

MLA:

Gueckstock, Oliver, et al. "Modulating the polarization of broadband terahertz pulses from a spintronic emitter at rates up to 10 kHz." Optica 8.7 (2021): 1013-1019.

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