标题： 有限尺寸半导体微线中的激子-极化子孤子 显示英文标题

标题： Exciton-polariton solitons in a semiconductor microwire of finite size

摘要： 激子-极化子孤子是由光与物质相互作用导致的耦合激子-光子态组成的强非线性准粒子。 在半导体微腔系统中，如半导体微米和纳米线，极化子具有负质量，当与排斥性的非线性激子-激子相互作用结合时，会导致明亮极化子孤子的产生。 在本工作中，我们研究了有限尺寸微腔波导中明亮激子-极化子孤子的动力学，假设辐射损耗由外部泵浦平衡。 通过雅可比椭圆函数，得到了运动模型方程的一个精确的明亮孤子解，该解由极化子脉冲的周期性序列组成。 找到了对应于脉冲序列中光子和激子成分能量的精确解析表达式。 结果表明，微米线波导的尺寸（即长度）在获得极化子孤子在介质中传播时所能携带的能量的定量估计中起着重要作用。 显示英文摘要

摘要： Exciton-polariton solitons are strongly nonlinear quasiparticles composed of coupled exciton-photon states due to the interaction of light with matter. In semiconductor microcavity systems such as semiconductor micro and nanowires, polaritons are characterized by a negative mass which when combined with the repulsive nonlinear exciton-exciton interaction, leads to the generation of bright polariton solitons. In this work we investigate the dynamics of bright exciton-polariton solitons in a finite-size microcavity waveguide, for which radiative losses are assumed balanced by the external pumping. An exact bright-soliton solution to the model equations of motion, consisting of a periodic train of polariton pulses, is obtained in terms of Jacobi elliptic functions. Exact analytical expressions corresponding to the energies of both photonic and excitonic components of the pulse train are found. Results suggest that the size (i.e. the length) of a microwire waveguide plays a relevant role in obtaining a quantitative estimate of the energy that could be conveyed by polariton solitons propagating in the medium.