A potential weakness of topological waveguides is that they act on a fixed narrow band of frequencies. However, by 3D printing samples from a photo-responsive polymer, we can obtain a device whose operating frequency can be fine-tuned dynamically using laser excitation. This greatly enhances existing static tunability strategies, typically based on modifying the geometry. We use a version of the classical Su–Schrieffer–Heeger model to demonstrate our approach.

中文翻译：

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Su-Schrieffer-Heeger 阵列中的可调拓扑边缘模式

拓扑波导的一个潜在弱点是它们作用于固定的窄带频率。然而，通过光敏聚合物的 3D 打印样品，我们可以获得一种设备，其工作频率可以使用激光激发动态微调。这极大地增强了现有的静态可调性策略，通常基于修改几何形状。我们使用经典的 Su–Schrieffer–Heeger 模型的一个版本来演示我们的方法。