Institut Pascal, PHOTON-N2, Clermont Université, Blaise Pascal University, CNRS, 24 Avenue des Landais, 63177 Aubière Cedex, France.
Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne EPFL, CH-1015 Lausanne, Switzerland.
Phys Rev Lett. 2014 Feb 14;112(6):066402. doi: 10.1103/PhysRevLett.112.066402. Epub 2014 Feb 11.
We show that the TE-TM modes splitting and the structure anisotropy of a semiconductor microcavity combine into a non-Abelian gauge field for exciton-polaritons or cavity photons. The field texture can be tuned simply by rotating the sample and ranges continuously from a Rashba to a monopolar field. In the noninteracting regime, the latter leads to remarkable focusing and conical diffraction effects. In the interacting regime, the spin-orbit coupling induces a breakdown of superfluidity. The spatially homogeneous flows become unstable and dynamically evolve into spin textured states, such as stripes or domain walls.
我们表明，半导体微腔的 TE-TM 模式分裂和结构各向异性组合成了激子极化激元或腔光子的非阿贝尔规范场。通过简单地旋转样品，就可以调节场的纹理，其范围从 Rashba 场连续变化到单极场。在非相互作用的情况下，后者会导致明显的聚焦和锥形衍射效应。在相互作用的情况下，自旋轨道耦合会导致超流的破坏。各向同性的流动变得不稳定，并动态地演变成具有条纹或畴壁等自旋织构的状态。
