Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- Tim Vogel
- Alan Omar
- Samira Mansourzadeh
- Frank Wulf
- Natalia Martin Sabanes
- Melanie Muller
- Tom S Seifert
- Alexander Weigel
- Gerhard Jakob
- Mathias Klaui
- Ioachim Pupeza
- Tobias Kampfrath
- Clara J Saraceno
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000810533400025&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1364/OE.453539
- Externe Identifier
- Clarivate Analytics Document Solution ID: 2B9XG
- PubMed Identifier: 36224790
- ISSN
- 1094-4087
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- OPTICS EXPRESS
- Paginierung
- 20451 - 20468
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Titel
- Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
- Sub types
- Article
- Ausgabe der Zeitschrift
- 30
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Abstract
- <jats:p>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 400 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.</jats:p>
- Autoren
- Tim Vogel
- Alan Omar
- Samira Mansourzadeh
- Frank Wulf
- Natalia Martín Sabanés
- Melanie Müller
- Tom S Seifert
- Alexander Weigel
- Gerhard Jakob
- Mathias Kläui
- Ioachim Pupeza
- Tobias Kampfrath
- Clara J Saraceno
- DOI
- 10.1364/oe.453539
- eISSN
- 1094-4087
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- Optics Express
- Sprache
- en
- Online publication date
- 2022
- Paginierung
- 20451 - 20451
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Herausgeber
- Optica Publishing Group
- Herausgeber URL
- http://dx.doi.org/10.1364/oe.453539
- Datum der Datenerfassung
- 2022
- Titel
- Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
- Ausgabe der Zeitschrift
- 30
Data source: Crossref
- 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 400 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.
- Autoren
- Tim Vogel
- Alan Omar
- Samira Mansourzadeh
- Frank Wulf
- Natalia Martín Sabanés
- Melanie Müller
- Tom S Seifert
- Alexander Weigel
- Gerhard Jakob
- Mathias Kläui
- Ioachim Pupeza
- Tobias Kampfrath
- Clara J Saraceno
- DOI
- 10.1364/oe.453539
- eISSN
- 1094-4087
- Externe Identifier
- PubMed Identifier: 36224790
- Funding acknowledgements
- Deutsche Forschungsgemeinschaft: projects A01 and B02 / 268565370
- European Research Council: 805202 - Project Teraqua
- European Research Council: 863155 - FET-Open grant agreement (s-Nebula)
- Deutsche Forschungsgemeinschaft: SFB TRR 173 Spin+X
- Ruhr-Universität Bochum: Open Access Publication Fund
- Deutsche Forschungsgemeinschaft: TRR 196 for Project M01 / 287022738
- Deutsche Forschungsgemeinschaft: projects A05 and B02
- European Research Council: 681917 - CoG project TERAMAG
- Deutsche Forschungsgemeinschaft: EXC-2033 / 390677874
- Deutsche Forschungsgemeinschaft: SFB TRR 227 “Ultrafast spin dynamics”
- Alexander von Humboldt-Stiftung: Sofja Kovalevskaja Preis
- Open access
- false
- ISSN
- 1094-4087
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- Optics express
- Sprache
- eng
- Medium
- Paginierung
- 20451 - 20468
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Datum der Datenerfassung
- 2022
- Titel
- Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 30
Data source: Europe PubMed Central
- 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 400 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.
- Autoren
- Tim Vogel
- Alan Omar
- Samira Mansourzadeh
- Frank Wulf
- Natalia Martín Sabanés
- Melanie Müller
- Tom S Seifert
- Alexander Weigel
- Gerhard Jakob
- Mathias Kläui
- Ioachim Pupeza
- Tobias Kampfrath
- Clara J Saraceno
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/36224790
- DOI
- 10.1364/OE.453539
- eISSN
- 1094-4087
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- Opt Express
- Sprache
- eng
- Country
- United States
- Paginierung
- 20451 - 20468
- PII
- 473147
- Datum der Veröffentlichung
- 2022
- Status
- Published
- Titel
- Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 30
Data source: PubMed
- Author's licence
- CC-BY
- Autoren
- Tim Vogel
- Alan Omar
- Samira Mansourzadeh
- Frank Wulf
- Natalia Martín Sabanés
- Melanie Müller
- Tom S Seifert
- Alexander Weigel
- Gerhard Jakob
- Mathias Kläui
- Ioachim Pupeza
- Tobias Kampfrath
- Clara J Saraceno
- Hosting institution
- Universitätsbibliothek Mainz
- Sammlungen
- JGU-Publikationen
- Resource version
- Published version
- DOI
- 10.1364/OE.453539
- File(s) embargoed
- false
- Open access
- true
- ISSN
- 1094-4087
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- Optic express
- Schlüsselwörter
- 530 Physik
- 530 Physics
- Sprache
- eng
- Open access status
- Open Access
- Paginierung
- 20451 - 20468
- Datum der Veröffentlichung
- 2022
- Public URL
- https://openscience.ub.uni-mainz.de/handle/20.500.12030/7947
- Herausgeber
- Optica
- Datum der Datenerfassung
- 2022
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2022
- Zugang
- Public
- Titel
- Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
- Ausgabe der Zeitschrift
- 30
Files
average_power_scaling_of_thz_-20221010143459111.pdf
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