Development of a microwave probe for the optical study of microwave-excited spin physics

ORAL

Abstract

We have developed an experimental probe that allows simultaneous broadband microwave excitation and optical excitation/detection at variable temperature and magnetic field. Specifically, we have designed a unique sample probe with a microwave stripline based sample mount that allows for direct optical access to the sample under study within a magneto- optical cryostat. This powerful combination enables optical studies of spintronic systems under microwave excitation using both CW (e.g. photo- and electro-luminescence) and time resolved (e.g. time resolved absorption/transmission and time resolved Kerr rotation, TRKR) techniques. To benchmark the capabilities of this probe we present data demonstrating simultaneous ferromagnetic resonance (FMR) and TRKR in a Fe/MgO/GaAs heterostructure. Such studies have potential applications in the study of FMR driven spin pumping and interaction of free carrier spins with native and engineered defects.

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Authors

  • Yu-Sheng Ou

    The Ohio State University, Dept. of Physics

  • Yi-Hsin Chiu

    The Ohio State University, Dept. of Physics

  • Rohan Adur

    The Ohio State University Department of Physics, The Ohio State University, Dept. of Physics

  • Patrick Odenthal

    Univ of California - Riverside, University of California Riverside, Dept.of Physics

  • Roland Kawakami

    Ohio State University and Univ of California - Riverside, The Ohio State University, Dept. of Physics, The Ohio State University, Ohio State University

  • P. Chris Hammel

    The Ohio State University, The Ohio State University, Columbus, Ohio 43210, USA, The Ohio State University Department of Physics, The Ohio State University, Dept. of Physics

  • Ezekiel Johnston-Halperin

    The Ohio State University, Dept. of Physics, Department of Physics, The Ohio State University, The Ohio State University