论文标题
手性拓扑极化态的共振激光激发和时间域成像
Resonant laser excitation and time-domain imaging of chiral topological polariton edge states
论文作者
论文摘要
我们研究了激光驱动下拓扑极化系统中手性边缘状态的动力学。使用由Karzig等人提出的手性耦合的模型系统，该模型系统由面侧面琐碎的激子和光子组成。 [物理。 Rev. X 5，031001（2015）]，我们研究了由激光脉冲驱动的该模型的晶格版本的实时动力学。通过分析电子系统中的时间和角度分辨光亮度的时间和动量分辨光谱函数，与时间和角度分辨的光发射光谱谱在电子系统中测量，我们发现功能区几何形状中的极性状态通过与泵激光光子频率的共振来选择性地激发。这种选择性激发机制与强激光泵送和偏振子凝结的必要性无关。我们的工作突出了时间分辨光谱的潜力，作为用于研究设备中拓扑边缘状态工程的真实空间成像的补充工具。
We investigate the dynamics of chiral edge states in topological polariton systems under laser driving. Using a model system comprised of topolgically trivial excitons and photons with a chiral coupling proposed by Karzig et al. [Phys. Rev. X 5, 031001 (2015)], we investigate the real-time dynamics of a lattice version of this model driven by a laser pulse. By analyzing the time- and momentum-resolved spectral function, measured by time- and angle-resolved photoluminescence in analogy with time- and angle-resolved photoemission spectroscopy in electronic systems, we find that polaritonic states in a ribbon geometry are selectively excited via their resonance with the pump laser photon frequency. This selective excitation mechanism is independent of the necessity of strong laser pumping and polariton condensation. Our work highlights the potential of time-resolved spectroscopy as a complementary tool to real-space imaging for the investigation of topological edge state engineering in devices.
