The present work discusses the possibility to achieve a high degree of spin polarization in a three-terminal quantum system. Irradiating the system, subjected to Rashba spin–orbit (SO) interaction, we find high degree of spin polarization under a suitable input condition along with different magnitudes and phases at the two output leads. The system is described within a tight-binding (TB) framework and the effect of irradiation is incorporated following the Floquet–Bloch (FB) ansatz. All the spin-dependent transmission probabilities are evaluated through Green’s function technique using Landauer–Bttiker formalism. Several possible aspects are included to make the system more realistic and examined rigorously in the present work. To name a few, the effects of irradiation, SO interaction, interface sensitivity, system size, system temperature are investigated, and finally, the role of correlated impurities are studied. Despite having numerous proposals available to generate and manipulate spin-selective transmissions, such a prescription exploiting the irradiation effect is relatively new to the best of our concern.

目前的工作讨论了在三端量子系统中实现高度自旋极化的可能性。辐照系统，受到 Rashba 自旋轨道（SO）相互作用，我们发现在合适的输入条件下高度自旋极化以及两个输出引线的不同幅度和相位。该系统在紧密结合 (TB) 框架内进行描述，并且在 Floquet-Bloch (FB) ansatz 之后结合了辐照效果。所有与自旋相关的传输概率都通过格林函数技术使用 Landauer-Bttiker 形式进行评估。包括几个可能的方面，以使系统在当前工作中更加现实和严格检查。仅举几例，辐照的影响，SO 相互作用，界面灵敏度，系统尺寸，研究了系统温度，最后研究了相关杂质的作用。尽管有许多可用于产生和操纵自旋选择性传输的建议，但这种利用辐照效应的处方对于我们来说是相对较新的。