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@ARTICLE{Adam:865024,
      author       = {Adam, Roman and Chen, Genyu and Bürgler, Daniel E. and
                      Shou, Tianyu and Komissarov, Ivan and Heidtfeld, Sarah and
                      Hardtdegen, Hilde and Mikulics, Martin and Schneider, Claus
                      M. and Sobolewski, Roman},
      title        = {{M}agnetically and optically tunable terahertz radiation
                      from {T}a/{N}i{F}e/{P}t spintronic nanolayers generated by
                      femtosecond laser pulses},
      journal      = {Applied physics letters},
      volume       = {114},
      number       = {21},
      issn         = {1077-3118},
      address      = {Melville, NY},
      publisher    = {American Inst. of Physics},
      reportid     = {FZJ-2019-04589},
      pages        = {212405 -},
      year         = {2019},
      abstract     = {We generate terahertz (THz) transients by illuminating a
                      few-nanometer-thick Ta/NiFe/Pt nanolayers with a train of
                      linearly polarized 100-fs-wide laser pulses. The transients
                      are ∼1-ps-wide free-space propagating bursts of
                      electromagnetic radiations with amplitudes that are
                      magnetically and optically tunable. Their spectral frequency
                      content extends up to 5 THz, and the 3-dB cutoff is at
                      0.85 THz. The observed transient electromagnetic signals
                      originate from the NiFe/Pt bilayer, and their amplitude
                      dependence on the external magnetic field, applied in the
                      sample plane, very closely follows the static magnetization
                      versus magnetic field dependence of the NiFe film. For the
                      same laser power, excitation with highly energetic, blue
                      light generates THz transients with amplitudes approximately
                      three times larger than the ones resulting from excitation
                      by infrared light. In both cases, the transients exhibit the
                      same spectral characteristics and are linearly polarized in
                      the perpendicular direction to the sample magnetization. The
                      polarization direction can be tuned by rotation of the
                      magnetic field around the laser light propagation axis. The
                      characteristics of our THz spintronic emitter signals
                      confirm that THz transient generation is due to the inverse
                      spin Hall effect in the Pt layer and demonstrate that
                      ferromagnet/metal nanolayers excited by femtosecond laser
                      pulses can serve as efficient sources of magnetically and
                      optically tunable, polarized transient THz radiation.},
      cin          = {PGI-6 / ER-C-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-6-20110106 / I:(DE-Juel1)ER-C-2-20170209},
      pnm          = {522 - Controlling Spin-Based Phenomena (POF3-522) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-522 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000482438000037},
      doi          = {10.1063/1.5099201},
      url          = {https://juser.fz-juelich.de/record/865024},
}