State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China.
Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
Phys Rev Lett. 2019 Oct 25;123(17):173903. doi: 10.1103/PhysRevLett.123.173903.
The dynamical evolution of light in asymmetric microcavities is of primary interest for broadband optical coupling and enhanced light-matter interaction. Here, we propose and demonstrate that the chaos-assisted photon transport can be engineered by regular periodic orbits in the momentum-position phase space of an asymmetric microcavity. Remarkably, light at different initial states experiences different evolution pathways, following either regular-chaotic channels or pure chaotic channels. Experimentally, we develop a nanofiber technique to accurately control the excitation position of light in the phase space. We find that the coupling to high-Q whispering gallery modes depends strongly on excitation in islands or chaotic sea, showing a good agreement with the theoretical prediction. The engineered chaotic photon transport has potential in light manipulation, broadband photonic devices, and phase-space reconstruction.
非对称微腔中光的动力学演化对于宽带光耦合和增强光物质相互作用至关重要。在这里，我们提出并证明，通过非对称微腔的动量-位置相空间中的规则周期轨道，可以实现混沌辅助光子输运。值得注意的是，处于不同初始状态的光会沿着规则-混沌通道或纯混沌通道经历不同的演化路径。在实验中，我们开发了一种纳米光纤技术来精确控制光在相空间中的激发位置。我们发现，与高 Q 值 whispering gallery 模式的耦合强烈依赖于在岛屿或混沌海中的激发，这与理论预测吻合较好。这种工程化的混沌光子输运在光操控、宽带光子器件和相空间重建方面具有潜在的应用前景。
