Gutenberg Open Science: Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-7932

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DC Field	Value	Language
dc.contributor.author	Vogel, Tim	-
dc.contributor.author	Omar, Alan	-
dc.contributor.author	Mansourzadeh, Samira	-
dc.contributor.author	Wulf, Frank	-
dc.contributor.author	Martín Sabanés, Natalia	-
dc.contributor.author	Müller, Melanie	-
dc.contributor.author	Seifert, Tom S.	-
dc.contributor.author	Weigel, Alexander	-
dc.contributor.author	Jakob, Gerhard	-
dc.contributor.author	Kläui, Mathias	-
dc.contributor.author	Pupeza, Ioachim	-
dc.contributor.author	Kampfrath, Tobias	-
dc.contributor.author	Saraceno, Clara J.	-
dc.date.accessioned	2022-10-17T09:57:22Z	-
dc.date.available	2022-10-17T09:57:22Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/7947	-
dc.description.abstract	Metallic spintronic terahertz (THz) emitters have become well-established for offering ultra-broadband, gapless THz emission in a variety of excitation regimes, in combination with reliable fabrication and excellent scalability. However, so far, their potential for high-average-power excitation to reach strong THz fields at high repetition rates has not been thoroughly investigated. In this article, we explore the power scaling behavior of tri-layer spintronic emitters using an Yb-fiber excitation source, delivering an average power of 18.5 W (7 W incident on the emitter after chopping) at 4(X) kHz repetition rate, temporally compressed to a pulse duration of 27 fs. We confirm that a reflection geometry with back-side cooling is ideally suited for these emitters in the high-average-power excitation regime. In order to understand limiting mechanisms, we disentangle the effects on THz power generation by average power and pulse energy by varying the repetition rate of the laser. Our results show that the conversion efficiency is predominantly determined by the incident fluence in this high-average-power, high-repetition-rate excitation regime if the emitters are efficiently cooled. Using these findings, we optimize the conversion efficiency and reach highest excitation powers in the back-cooled reflection geometry. Our findings provide guidelines for scaling the power of THz radiation emitted by spintronic emitters to the milliwatt-level by using state-of-the-art femtosecond sources with multi-hundred-Watt average power to reach ultra-broadband, strong-field THz sources with high repetition rate.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-7932	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.number	7940	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Optic express	de
jgu.journal.volume	30	de
jgu.journal.issue	12	de
jgu.pages.start	20451	de
jgu.pages.end	20468	de
jgu.publisher.year	2022	-
jgu.publisher.name	Optica	de
jgu.publisher.place	Washington, DC	de
jgu.publisher.issn	1094-4087	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1364/OE.453539	de
jgu.organisation.ror	https://ror.org/023b0x485	-
Appears in collections:	JGU-Publikationen

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