Rate-equations description of spin lasers

Lasers in which spin-polarized carriers are injected provide paths to different practical room-temperature spintronic devices, not limited to magnetoresistive effects [1]. The rate equations that describe the dynamics of spin lasers have relied on a linear gain mode, in spite of the nonlinear dependence of gain on the carrier density [2]. We apply a nonlinear gain model based on accurate electronic structure calculations to develop a more general description of spin lasers and reveal the effects of such a nonlinear gain model on the dynamics of spin lasers.
[1] M. Lindemann, et al., Nature 568, 212 (2019).
[2] P. E. Faria Junior, et al., Phys. Rev. B 95, 115301 (2017).