Active metamaterials have shown huge advantages to control electromagnetic and acoustic waves. However, how to use active metamaterials to control thermal waves has not been explored, though thermal waves are significant in various fields. To address the problem, here we report an active scheme for thermal wave cloaks. The thermal waves are based on conduction and convection, which are dominated by the Fourier and Darcy laws, respectively. By calculating the propagation of thermal waves in a free space, we can derive the global temperature and pressure distributions. We then apply these calculation results to actively control the boundary temperature and pressure, and active thermal wave cloaks can be obtained. Compared with existing passive schemes to control thermal waves, the present active scheme is more flexible for switching on/off and changing geometries. This work provides active and controllable components to thermal wave cloaks, which can be further used to design more active thermal wave metamaterials.

活性超材料已经显示出控制电磁波和声波的巨大优势。然而，尽管热波在各个领域都非常重要，但尚未探索如何使用活性超材料来控制热波。为了解决这个问题，我们在这里报告了一种有效的热浪披风方案。热波基于传导和对流，分别由傅立叶和达西定律主导。通过计算热波在自由空间中的传播，我们可以得出整体温度和压力分布。然后，我们将这些计算结果应用于主动控制边界温度和压力，并获得主动的热浪斗篷。与现有的控制热波的无源方案相比，本发明的主动方案对于打开/关闭和改变几何形状更加灵活。这项工作为热浪披风提供了主动和可控的组件，可以进一步将其用于设计更具活性的热浪超材料。