Cyclotron and combinational resonance in a magnetic field perpendicular to the plane of the loop. Properties of semiconductors with an extremum loop. Vectorized optoelectronic control and metrology in a semiconductor. Quantum entanglement of the spin and orbital angular momentum of photons using metamaterials. Interlayer exciton laser of extended spatial coherence in atomically thin heterostructures. Room temperature nanocavity laser with interlayer excitons in 2D heterostructures. Monolayer semiconductor nanocavity lasers with ultralow thresholds. Spin-optical metamaterial route to spin-controlled photonics. Our monolayer-integrated spin-valley microcavities open avenues for further classical and non-classical coherent spin-optical light sources exploring both electron and photon spins. The Rashba monolayer laser shows intrinsic spin polarizations, high spatial and temporal coherence, and inherent symmetry-enabled robustness features, enabling valley coherence in the WS 2 monolayer upon arbitrary pump polarizations at room temperature.
Inspired by the creation of valley pseudo-spins in monolayers, the spin-valley modes are generated from a photonic Rashba-type spin splitting of a bound state in the continuum, which gives rise to opposite spin-polarized ± K valleys due to emergent photonic spin–orbit interaction under inversion symmetry breaking. Here we report on a spin-optical monolayer laser by incorporating a WS 2 monolayer into a heterostructure microcavity supporting high- Q photonic spin-valley resonances. Direct-bandgap transition metal dichalcogenide monolayers are appealing candidates to construct atomic-scale spin-optical light sources owing to their valley-contrasting optical selection rules.
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