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  Impact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayer

Herapath, R. I., Hornett, S. M., Seifert, T., Jakob, G., Kläui, M., Bertolotti, J., et al. (2018). Impact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayer. Applied Physics Letters, 114(04): 041107. Retrieved from http://arxiv.org/abs/1808.00746.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-0128-0 Version Permalink: https://hdl.handle.net/21.11116/0000-0003-00A9-E
Genre: Journal Article

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 Creators:
Herapath, Rosamund I.1, Author
Hornett, Sam M.1, Author
Seifert, Tom2, 3, Author           
Jakob, Gerhard4, 5, Author
Kläui, Mathias4, 5, Author
Bertolotti, Jacopo1, Author
Kampfrath, Tobias2, 3, Author           
Hendry, Euan1, Author
Affiliations:
1University of Exeter, Physics building, Stocker Road, Exeter, UK, EX4 4QL, ou_persistent22              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
3Department of Physics, Freie Universität Berlin, 14195 Berlin, Germany, ou_persistent22              
4Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany, ou_persistent22              
5Graduate School of Excellence Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany, ou_persistent22              

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Free keywords: Physics, Optics, physics.optics
 Abstract: We systematically study the pump-wavelength dependence of terahertz pulse generation in thin-film spintronic THz emitters composed of a ferromagnetic Fe layer between adjacent nonmagnetic W and Pt layers. We find that the efficiency of THz generation is essentially at for excitation by 150 fs pulses with center wavelengths ranging from 900 to 1500 nm, demonstrating that the spin current does not depend strongly on the pump photon energy. We show that the inclusion of dielectric overlayers of TiO2 and SiO2, designed for a particular excitation wavelength, can enhance the terahertz emission by a factor of of up to two in field.

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Language(s): eng - English
 Dates: 2018-08-022018-07-122018-12-212018-02-012018-01-28
 Publication Status: Issued
 Pages: 57
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 1808.00746
URI: http://arxiv.org/abs/1808.00746
 Degree: -

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Project name : TERAMAG - Ultrafast spin transport and magnetic order controlled by terahertz electromagnetic pulses
Grant ID : 681817
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: 5 Volume / Issue: 114 (04) Sequence Number: 041107 Start / End Page: - Identifier: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223