Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer

• Material Type: 文書・図像類
• Title: Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer
• Author/Editor: Mag-usara, Valynn Katrine; Escaño, Mary Clare; Petoukhoff, Christopher E.; Torosyan, Garik; Scheuer, Laura; Madéo, Julien; Afalla, Jessica; Talara, Miezel; Muldera, Joselito E.; Kitahara, Hideaki; Bacon, David R.; Nakajima, Makoto; Dani, Keshav; Papaioannou, Evangelos Th.; Beigang, René; Tani, Masahiko
• Author Heading: Mag-usara, Valynn Katrine; Escaño, Mary Clare; Petoukhoff, Christopher E.; Torosyan, Garik; Scheuer, Laura; Madéo, Julien; Afalla, Jessica; Talara, Miezel; Muldera, Joselito E.; Kitahara, Hideaki; Bacon, David R.; Nakajima, Makoto; Dani, Keshav; Papaioannou, Evangelos Th.; Beigang, René; Tani, Masahiko
• Publication, Distribution, etc.: Cell Press
• Publication Date: 2022-07-15
• Publication Date (W3CDTF): 2022-07-15
• Alternative Title: Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer
• Periodical title: iScience
• No. or year of volume/issue: 25 7
• Volume: 25
• Issue: 7
• Pages: 1-16
• Text Language Code: eng
• Target Audience: 一般
• Note (General): Terahertz emission from ferromagnetic/non-magnetic spintronic heterostructures had been demonstrated as pump wavelength-independent. We report, however, the pump wavelength dependence of terahertz emission from an optimized Fe/Pt spintronic bilayer on MgO substrate. Maximum terahertz generation per total pump power was observed in the 1200- to 1800-nm pump wavelength range, and a marked decrease in the terahertz emission efficiency beyond 2500 nm (pump photon energies <0.5 eV) suggests a ∼0.35-eV threshold pump photon energy for effective spintronic terahertz emission. The inferred threshold is supported by previous theoretical results on the onset energy of significant spin-filtering at the Fe-Pt interface, and confirmed by Fe/Pt electronic structure calculations in this present work. The results of terahertz time-domain emission spectroscopy show the sensitivity of spintronic terahertz emission to both the optical absorptance of the heterostructure and the energy-dependent spin transport, as dictated by the properties of the metallic thin films.; source:https://www.sciencedirect.com/science/article/pii/S2589004222008872
• Source: https://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=29204&item_no=1&attribute_id=22&file_no=1
• Access Restrictions: 限定公開
• Rights (production): cc-by; CC BY
• Related Material (DOI): 10.1016/j.isci.2022.104615
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ