论文标题
建模量子发射器与纳米光结构中光场的手性偶联的时空动力学
Modelling spatio-temporal dynamics of chiral coupling of quantum emitters to light fields in nanophotonic structures
论文作者
论文摘要
放置在纳米光子结构中的量子发射极可导致非转向现象，例如手性光激发。在这里，我们提出了一个理论模型，以对有限差分时间域（FDTD）模拟中的电磁场的密度矩阵形式形式描述为循环极化的发射器。特别是，我们讨论了如何在模拟中实现复杂的电场以利用旋转波近似。通过将我们的模型应用于介电波导和光学循环器中的量子发射极，我们显示了量子系统的激发如何取决于其位置和极化。反过来，背耦合会导致强烈的不对称光激发。我们的框架和结果将有助于更好地理解包含量子发射器的纳米光结构中光场的时空动力学。
A quantum emitter placed in a nanophotonic structure can result in non-reciprocal phenomena like chiral light excitation. Here, we present a theoretical model to couple circularly polarized emitters described by the density matrix formalism to the electromagnetic fields within a finite-difference time-domain (FDTD) simulation. In particular, we discuss how to implement complex electric fields in the simulation to make use of the rotating wave approximation. By applying our model to a quantum emitter in a dielectric waveguide and an optical circulator, we show how the excitation of the quantum system depends on its position and polarization. In turn, the backcoupling can result in strongly asymmetric light excitation. Our framework and results will help better understand spatio-temporal dynamics of light field in nanophotonic structures containing quantum emitters.
