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dc.contributor.authorHerapath, RI
dc.contributor.authorHornett, SM
dc.contributor.authorSeifert, T
dc.contributor.authorJakob, G
dc.contributor.authorKläui, M
dc.contributor.authorBertolotti, J
dc.contributor.authorKampfrath, T
dc.contributor.authorHendry, E
dc.date.accessioned2018-10-18T13:27:33Z
dc.date.issued2019-02-01
dc.description.abstractWe 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.en_GB
dc.description.sponsorshipThe authors like to acknowledge support via the EPSRC Centre for Doctoral Training in Metamaterials (Grant No. EP/L015331/1). EH acknowledges support from EPSRC fellowship (EP/K041215/1). TK, TSS, MK and GJ acknowledge the German Research Foundation for funding through the collaborative research centers SFB TRR 227 Ultrafast spin dynamics (project B02) and SFB TRR 173 Spin+X as well as the Graduate School of Excellence Materials Science in Mainz (MAINZ, GSC 266). TK also acknowledges funding through the ERC H2020 CoG project TERAMAG/Grant No. 681917.en_GB
dc.identifier.citationVol. 114, article 041107en_GB
dc.identifier.doi10.1063/1.5048297
dc.identifier.urihttp://hdl.handle.net/10871/34345
dc.language.isoenen_GB
dc.publisherAIP Publishingen_GB
dc.rights© 2019 The Author(s). Open access. ll article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.titleImpact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayeren_GB
dc.typeArticleen_GB
dc.descriptionThis is the final version. Available on open access from AIP Publishing via the DOI in this recorden_GB
dc.identifier.journalApplied Physics Letters
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
refterms.dateFOA2019-02-01T15:57:52Z


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© 2019 The Author(s). Open access. ll article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's licence is described as © 2019 The Author(s). Open access. ll article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).