[19p-E215-1~17] 4.5 Terahertz Photonics

▲ [19p-E215-6] Efficient THz Generation of Diabolo-Shaped Spintronic Fe/Pt Bilayer on MgO Substrate using 780-nm Pump Wavelength

〇(D)Miezel Legurpa Talara¹、Chiyaka Tachioka¹、Valynn Katrine Mag-usara¹、Hideaki Kitahara²、Joselito Muldera^1,3、Dmitry Bulgarevich⁴、Makoto Watanabe⁴、Jessica Pauline Afalla¹、Elmer Estacio^1,5、Katsuhiko Saito⁶、Qixin Guo⁶、Masahiko Tani¹ (1.Res Ctr for Dev of Far-Infrared Region, Univ of Fukui, Jpn、2.Laser THz Res Div, Ins of Laser Eng, Osaka Univ, Jpn、3.Physics Dept, De La Salle Univ, Phil、4.Res Ctr for Structural Mat, NIMS, Jpn、5.Nat Ins of Phys, Univ of the Phil-Diliman, Phil、6.Dept of EE Eng, Saga Univ, Jpn)

キーワード：spintronics, diabolo, THz emission

In this paper, we compared THz emission amplitude of a diabolo-shaped spintronic Fe/Pt bilayer and an unstructured spintronic Fe/Pt bilayer using standard THz-Time Domain Spectroscopy (THz-TDS) system. Results showed THz emission amplitude of the diabolo-shaped spintronic bilayer to be ~3x stronger than that of the unstructured one. The improved THz emission amplitude of the shaped spintronic bilayer can be attributed to the near-field electromagnetic radiation coupled with the enhanced and confined magnetic optical field provided by the diabolo-shaped structure.