论文标题
在交叉电场中无旋转微腔极化子的巨型合成规场
Giant synthetic gauge field for spinless microcavity polaritons in crossed electric and magnetic fields
论文作者
论文摘要
可以通过施加交叉电场和磁场来合成远离自由度的电气中性激子极化子的人工量规场。仪表电势的出现可以归因于运动（磁电动）的鲜明效应，该效应是导致对激子动能的线性贡献贡献的原因。我们研究了这种现象与竞争效果的相互作用，这是由于速度分裂的重新归一化而引起的，这是由于移动激子的电子孔重叠的减少。对这种机制的解释对于狂犬分裂和激子结合能的结构至关重要。此外，我们提出了一种方法，该方法可以促进所考虑系统中的量规场。它利用了从氢状激子到强烈偶极的激子状态的交叉，在特定的电场和磁场选择下。激子能量对在该状态中动量的强灵敏度导致了量规场的较大值。我们考虑了GAAS环形北极浆果相干干涉仪的具体示例，并表明有效磁场的通量可能接近所考虑的交叉状态中的通量量子值。
The artificial gauge field for electrically neutral exciton polaritons devoid from the polarization degree of freedom can be synthesized by means of applying crossed electric and magnetic fields. The appearance of the gauge potential can be ascribed to the motional (magneto-electric) Stark effect which is responsible for the presence of a linear-in-momentum contribution to the exciton kinetic energy. We study the interplay of this phenomenon with the competing effect which arises from the Rabi-splitting renormalization due the reduction of the electron-hole overlap for a moving exciton. Accounting for this mechanism is crucial in the structures with the high ratio of Rabi splitting and the exciton binding energy. Besides, we propose an approach which boosts the gauge field in the considered system. It takes advantage of the crossover from the hydrogen-like exciton to the strongly dipole-polarized exciton state at a specific choice of electric and magnetic fields. The strong sensitivity of the exciton energy to the momentum in this regime leads to the large values of the gauge field. We consider the specific example of a GaAs ring-shape polariton Berry phase interferometer and show that the flux of the effective magnetic field may approach the flux quantum value in the considered crossover regime.
