Arbitrary helicity control of circularly polarized light from lateral-type spin-polarized light-emitting diodes at room temperature

  title={Arbitrary helicity control of circularly polarized light from lateral-type spin-polarized light-emitting diodes at room temperature},
  author={Nozomi Nishizawa and Masaki Aoyama and Ronel Christian Roca and Kazuhiro Nishibayashi and Hiro Munekata},
  journal={Applied Physics Express},
We demonstrate arbitrary helicity control of circularly polarized light (CPL) emitted at room temperature from the cleaved side facet of a lateral-type spin-polarized light-emitting diode (spin-LED) with two ferromagnetic electrodes in an antiparallel magnetization configuration. Driving alternate currents through the two electrodes results in polarization switching of CPL with frequencies up to 100 kHz. Furthermore, tuning the current density ratio in the two electrodes enables manipulation of… 

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