Sharabi Yonatan, Lustig Eran, Segev Mordechai
Solid State Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Phys Rev Lett. 2021 Apr 23;126(16):163902. doi: 10.1103/PhysRevLett.126.163902.
We study the propagation of electromagnetic waves in disordered photonic time crystals: spatially homogenous media whose refractive index changes randomly in time. We find that the group velocity of a pulse propagating in such media decreases exponentially, eventually coming to a complete stop, while experiencing exponential growth in intensity. These effects greatly depend on the Floquet band structure of the photonic time crystal, with the strongest sensitivity to disorder occurring in superluminal modes. Finally, we analyze the ensemble statistics and find them to coincide with those of Anderson localization, exhibiting single parameter scaling.
即折射率随时间随机变化的空间均匀介质。我们发现，在这种介质中传播的脉冲群速度呈指数下降，最终完全停止，同时强度呈指数增长。这些效应在很大程度上取决于光子时间晶体的弗洛凯能带结构，其中超光速模式对无序最为敏感。最后，我们分析了系综统计量，发现它们与安德森局域化的统计量一致，呈现单参数标度。
