In this article we report the magneto-optical (MO) and electro-optical (EO) modulation, in the terahertz regime, of the photonic spin Hall effect (PSHE) of reflected light from the surface of the topological silicene-substrate quantum systems subjected to external electric and magnetic fields. The prominent feature of these 2D materials is the tunable band gap that can be controlled by an external electric field or by irradiating circular polarized light beam. We demonstrate that the in-plane and transverse spatial spin dependent shifts are quantized due to the Landau level (LL) quantization of the MO conductivities. By controlling the staggered electric potential, we can drive the system through several topological quantum phase transitions. The magnitude of the giant PSHE in these materials is several times larger than the incident Gaussian beam wavelength. Furthermore, the PSHE shifts are extremely sensitive to the spin and valley indices of the Dirac fermions in these materials promising potential in the design of surface sensors, spin-dependent beam splitters, precision meteorology and quantum information processing.

在本文中，我们报告了在太赫兹状态下，来自拓扑硅碳-衬底量子系统表面​​的反射光的光子自旋霍尔效应（PSHE）的磁光（MO）和电光（EO）调制外部电场和磁场。这些2D材料的显着特征是可调节的带隙，该带隙可以通过外部电场或通过辐射圆偏振光束来控制。我们证明，由于MO电导率的朗道能级（LL）量化，平面和横向空间自旋相关的位移被量化。通过控制交错的电势，我们可以通过几个拓扑量子相变来驱动系统。这些材料中巨型PSHE的大小是入射高斯光束波长的几倍。此外，在这些材料中，PSHE位移对狄拉克费米子的自旋和谷值指数极为敏感，有望在表面传感器，自旋相关的分束器，精确气象学和量子信息处理的设计中发挥潜力。