Landau level (LL) engineered photonic spin Hall effect (PSHE) holds great promise for nanoscale manipulation and steering of magneto-optical transport in two-dimensional atomic systems. Herein, we theoretically investigate PSHE modulated by LL transitions $\delta n=n^{\prime }-n=0, \pm 2$ (where $n$ and n' indicate the LL indexes of valence and conduction bands, respectively) in monolayer $\mathrm{WT}{\mathrm{e}}_2$. Results show that PSHE tuned by $\delta n=0, \pm 2$ has completely different dependent behaviors on LLs, incident angle of incident photons, and magnetic induction intensity. These discrepancies are ascribed to Hall-conductivity-incurred Hall angle Θ because the variation tendency of photonic spin Hall shifts is similar to that of Θ with changing the LL index. Giant PSHE with the largest in-plane displacement of more than 400 times of incident wavelength is obtained at the transition $|n=55\rangle \to |n^{\prime }=57\rangle$. Remarkably enhanced PSHE occurs at near-zero Hall angles. In-plane and transverse spin-dependent displacements give their respective extremum values at the same incident angles when the Θ is near to zero, and their incident-angle deviation will become larger and larger as the $\left|\mathrm{\Theta }\right|$ increases. This unambiguously confirms the strong influence of Hall angle in the PSHE, shedding important insights into the fundamental properties of spin-orbit interaction of light in time-reversal symmetry breaking quantum systems.

Close

PrevNext

View figure in article

• Electronic transitions
• High magnetic fields
• Landau levels
• Landau theory
• Light propagation, transmission & absorption
• Magneto-optical effect
• Nanophotonics
• Optical conductivity
• Optical interactions with surfaces
• Spin optoelectronics