Spin-Orbit Coupling and the Optical Spin Hall Effect in Photonic Graphene
Spin-Orbit Coupling and the Optical Spin Hall Effect in Photonic Graphene
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DOI：
10.1103/physrevlett.114.026803
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发表时间：
2015-01-16
影响因子：
8.6
通讯作者：
Solnyshkov, D. D.
中科院分区：
文献类型：
--
作者：
Nalitov, A. V.;Malpuech, G.;Solnyshkov, D. D.
研究了光子蜂窝晶格中TE和TM光模分裂引起的自旋轨道耦合。利用紧结合的方法，我们解析地计算了带的结构。在狄拉克点附近，我们得到了有效哈密顿量。我们发现局域约简对称性（D-3h）将TE-TM有效磁场转化为具有Dresselhaus对称性的涌现场。结果，粒子变大了，但没有缝隙打开。光自旋霍尔效应揭示了涌现场的对称性。
We study the spin-orbit coupling induced by the splitting between TE and TM optical modes in a photonic honeycomb lattice. Using a tight-binding approach, we calculate analytically the band structure. Close to the Dirac point, we derive an effective Hamiltonian. We find that the local reduced symmetry (D-3h) transforms the TE-TM effective magnetic field into an emergent field with a Dresselhaus symmetry. As a result, particles become massive, but no gap opens. The emergent field symmetry is revealed by the optical spin Hall effect.