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A (002) dark-field TEM image of a quantum dot spin-LED.
(Color online) (a) Polarization-resolved EL spectra of the quantum-well spin-LED for zero magnetic field and . (b) Polarization degree vs magnetic field for a sample with a 750-nm-thick spin aligner, for a sample with a thin (50 nm) spin aligner and for direct optical unpolarized quantum-well excitation.
(Color online) (a) Polarization degree of the EL from the quantum-well spin-LED (thick DMS layer) at different sample temperatures. (b) Polarization degree at different driving currents.
(Color online) (a) Polarization resolved EL spectra of the QD sample. (b) Polarization degree of the quantum dot EL from the sample with spin-aligner layer and the reference sample, respectively.
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