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Photon densities of the left and right circularly polarized light as a function of electron current with polarization , infinite electron spin relaxation time, and LR. is normalized to the unpolarized threshold current , and is normalized to . The vertical lines indicate and thresholds, the arrows show their change when is reduced. Inset: total photon density for unpolarized laser and two spontaneous-emission coupling coefficients , as well as a spin laser with and .
Electron and photon polarizations as a function of injection current , with polarization and different ratios of recombination and electron spin relaxation time, . LR and QR recombinations are shown. is normalized to the unpolarized threshold .
Threshold current reduction as a function of injection polarization . Shown are both LR and QR for various , the ratio of recombination time, and electron spin relaxation time. The hole spin relaxation time , except for the circles that show the previously assumed “ideal” case, in which .
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