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31 January 2020 Low-threshold pure-circular polarization electro-luminescence from spin-light-emitting diodes consisting of oxidized Al/AlAs tunnel barriers
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Abstract
We report lateral-type, GaAs/AlGaAs double hetero-structure (DH) spin-LEDs with stripe Fe spin injectors that exhibit nearly pure circular polarization (CP) electroluminescence (EL) with current densities of J ~ 10 A/cm2 or less. Experiments with such spin-LEDs have made it possible to obtain experimental data that were not accessible in the first report [1,2]: namely, clear experimental proof for the presence of a threshold J value at which the annihilation of minority-helicity CPEL component takes place.
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Hiro Munekata "Low-threshold pure-circular polarization electro-luminescence from spin-light-emitting diodes consisting of oxidized Al/AlAs tunnel barriers", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112880Q (31 January 2020); https://doi.org/10.1117/12.2545701
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