Topological characteristics, including invariant topological orders, band inversion, and the topological edge mode (TEM) in photonic insulators, have been widely studied. Whether intriguing topological modes can be taken advantage of in simple one-dimensional systems to implement some practical applications is an issue, which is of increasing concern. In this work, based on a photonic dimer chain composed of ultrasubwavelength resonators, we verify experimentally that the TEM in the effective second-order parity-time (PT) system is immune to the inner disorder perturbation, and can be used to realize the long-range wireless power transfer (WPT) with high transmission efficiency. To intuitively show the TEM can be used for WPT, a power signal source is used to excite the TEM. It can be clearly seen that two light-emitting diode (LED) lamps with 0.5 W at both ends of the structure are lit up with the aid of TEMs. In addition, in order to solve the special technical problems of standby power loss and frequency tracking, we further propose that a WPT system with effective third-order PT symmetry can be constructed by using one topological interface mode and two TEMs. Inspired by the long-range WPT with TEMs in this work, the use of more complex topological structures is expected to achieve energy transmission with more functions, such as the WPT devices whose direction can be selected flexibly in the quasiperiodic or trimer topological chains.

中文翻译：

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通过二聚体链中的拓扑模式进行无线功率传输

拓扑特性，包括不变的拓扑顺序，能带反转和光子绝缘子的拓扑边缘模式（TEM），已经得到了广泛的研究。是否可以在简单的一维系统中利用有趣的拓扑模式来实现某些实际应用是一个问题，这一问题日益引起人们的关注。在这项工作中，基于由超亚波长谐振器组成的光子二聚体链，我们通过实验验证了TEM在有效的二阶奇偶时间（PT）系统不受内部扰动的干扰，可用于实现具有高传输效率的远程无线电力传输（WPT）。为了直观地显示TEM可以用于WPT，使用电源信号源来激发TEM。可以清楚地看到，在两个结构末端的0.5 W发光二极管（LED）灯借助TEM点亮。另外，为了解决待机功耗和频率跟踪的特殊技术问题，我们进一步提出一种具有有效三阶PT的WPT系统通过使用一种拓扑接口模式和两个TEM可以构建对称性。受到这项工作中带有TEM的远程WPT的启发，预期使用更复杂的拓扑结构可以实现具有更多功能的能量传输，例如可以在准周期或三重拓扑链中灵活选择方向的WPT设备。