[17p-A404-1~14] 3.16 Optics and Photonics English Session

▲ [17p-A404-5] Efficient Terahertz Generation Using Fe/Pt Spintronic Emitter Excited at 800 nm and 1550 nm

〇(P)Valynn Katrine Magusara¹, Garik Torosyan^2,3, Jessica Afalla¹, Joselito Muldera¹, Dmitry Bulgarevich¹, Hideaki Kitahara¹, Sascha Keller^3,4, Laura Scheuer^3,4, Johannes Lhuillier^2,3, Rene Beigang^3,4, Evangelos Th. Papaioannou^3,4, Masahiko Tani¹ (1.FIR Center of Univ. of Fukui, 2.Photonic Center Kaiserslautern, 3.OPTIMAS of Univ. of Kaiserslautern, 4.Physics Dept. of Univ. of Kaiserslautern)

Keywords:terahertz, spintronic emitter, terahertz emitter

Spintronic heterostructures consisting of ferromagnetic and non-magnetic metal thin films have been demonstrated as novel and highly promising sources of broadband THz radiation. Such spintronic THz emitters had only been intensively investigated so far at 800-nm excitation wavelength using femtosecond Ti:sapphire lasers. In this work, we demonstrate that an optimized Fe/Pt spintronic heterostructure is just as effective as a THz radiation source when excited either at λ = 800 nm or at λ = 1550 nm by ultrafast laser pulses from a relatively low cost and compact fs fiber laser. Even with low incident power levels such as 1 mW, the Fe/Pt spintronic emitter exhibits efficient generation of THz radiation at different excitation wavelengths.