School of Physics and Astronomy, University of Southampton, SO17 1BJ, Southampton, United Kingdom.
School of Physics and Astronomy, Monash University, Victoria 3800, Australia.
Phys Rev Lett. 2018 Aug 3;121(5):053901. doi: 10.1103/PhysRevLett.121.053901.
We propose using the effective spin-orbit coupling of light in Bragg-modulated cylindrical waveguides for the efficient separation of spin-up and spin-down photons emitted by a single photon emitter. Because of the spin and directional dependence of photonic stop bands in the waveguides, spin-up (-down) photon propagation in the negative (positive) direction along the waveguide axis is blocked while the same photon freely propagates in the opposite direction. Frequency shifts of photonic band structures induced by the spin-orbit coupling are verified by finite-difference time-domain numerical simulations.
我们提出利用布拉格调制圆柱波导中的有效自旋轨道耦合来高效地分离单光子发射器发射的自旋向上和自旋向下的光子。由于波导中光子带隙具有自旋和方向依赖性，因此自旋向上（下）光子沿波导轴的负（正）方向传播时被阻挡，而相同的光子在相反方向上则自由传播。通过有限差分时域数值模拟验证了自旋轨道耦合引起的光子带结构频移。
