论文标题
在紧张的蜂窝状晶格中直接观察光子兰道水平和螺旋边缘状态
Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices
论文作者
论文摘要
我们报告了耦合半导体微柱蜂窝晶格中光子和极性子的合成磁场的实现。通过在晶格中进行单轴跳跃梯度，在S和P轨道频段中诱导了强大的合成场，从而导致狄拉克点的Landau水平形成。我们提供了最低级Landau级波功能的Sublattice对称破坏的直接证据，这是合成磁场的独特特征。我们的实现使螺旋边缘状态在n = 0和n = 1兰道水平之间的缝隙中实现，这在实验上证明了一种新型的工程方式，可以在光子晶格中传播边缘状态。鉴于北极星非线性增强的最新进展，此处报告的Landau水平有望研究假磁性和光子系统中的相互作用之间的相互作用。
We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars. A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice, giving rise to the formation of Landau levels at the Dirac points. We provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction, a distinctive feature of synthetic magnetic fields. Our realization implements helical edge states in the gap between n=0 and n=1 Landau levels, experimentally demonstrating a novel way of engineering propagating edge states in photonic lattices. In light of recent advances in the enhancement of polariton-polariton nonlinearities, the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system.
