论文标题
驱动的Moiré激子 - 果龙的光学非线性和自发的翻译对称性破坏
Optical non-linearities and spontaneous translational symmetry breaking in driven-dissipative moiré exciton-polaritons
论文作者
论文摘要
由半导体双层形成的Moiré晶格构成了紧密局部的激子，可以同时强烈地发光并拥有大型的电偶极矩。这有助于实现新形式的极化子，这些偏光子是非常强烈的相互作用，并且预测会导致由多光子共振控制的强烈光学非线性。在这里，我们研究了在强烈的光学驾驶条件下，激子 - 表面（偶极）相互作用的非本地分量（偶性）相互作用的作用。我们发现，非本地相互作用可以强烈影响稳态特性，从而导致多型转换对称性破裂，并明显的多光子共振。我们开发了一种自洽的方法来描述与空腔场相连的Moiré激子的稳态解，从而在半经典级别处理了激子和光子场之间的远距离相互作用。
Moiré lattices formed from semiconductor bilayers host tightly localised excitons that can simultaneously couple strongly to light and possess large electric dipole moments. This facilitates the realization of new forms of polaritons that are very strongly interacting and that have been predicted to lead to strong optical nonlinearities controlled by multi-photon resonances. Here, we investigate the role of the non-local component of the exciton-exciton (dipolar) interactions on the optical response of these strongly-interacting moiré exciton-polaritons under conditions of strong optical driving. We find that the non-local interactions can strongly influence the steady-state properties leading to multi-stabilities with broken translational symmetry and pronounced distortions of the multi-photon resonances. We develop a self-consistent approach to describe the steady-state solution of moiré excitons coupled to a cavity field, treating the long-range interaction between the excitons and the photon field at the semi-classical level.
