论文标题
各向异性光子时间晶体中的固定电荷辐射
Stationary Charge Radiation in Anisotropic Photonic Time Crystals
论文作者
论文摘要
时间超材料具有巨大的波浪操作潜力，近年来引起了人们的关注。在这里，我们探讨了各向异性光子时间晶体（APTC）中的外来波动力学，该动态是由各向异性介质形成的，其光学特性在时间上均匀地改变了。基于时间传递矩阵形式主义，我们表明嵌入APTC中的固定电荷可以发射辐射，而各向同性光子时间晶体的情况相反，并且其在动量空间中的分布受APTC谱带结构控制。我们的方法扩展了时间超材料的功能，为同时产生辐射和控制提供了新的机会，对经典和量子应用的影响。
Time metamaterials exhibit a great potential for wave manipulation, drawing increasing attention in recent years. Here, we explore the exotic wave dynamics in an anisotropic photonic time crystal (APTC), formed by an anisotropic medium whose optical properties are uniformly and periodically changed in time. Based on a temporal transfer matrix formalism, we show that a stationary charge embedded in an APTC can emit radiation, in contrast to the case of an isotropic photonic time crystal, and its distribution in momentum space is controlled by the APTC band structure. Our approach extends the functionalities of time metamaterials, offering new opportunities for simultaneous radiation generation and control, with implications for both classical and quantum applications.
