Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro and Nano Photonic Structures (MOE), Fudan University, Shanghai 200438, China.
Phys Rev E. 2019 Dec;100(6-1):062108. doi: 10.1103/PhysRevE.100.062108.
Thermal management has made considerable progress in the past decade for the emerging field of thermal metamaterials. However, two severe problems still handicap the development of thermal metamaterials. That is, thermal conductivities should be singular and uncommon as required by corresponding theories. To solve these problems, here we establish the theory of dipole-assisted thermotics. By tailoring the thermal dipole moment, thermal invisibility can be achieved without the requirements of singular and uncommon thermal conductivities. Furthermore, finite-element simulations and laboratory experiments both validate the theoretical analyses. The performance of the dipole-driven scheme is excellent in both two and three dimensions, and in both steady and transient states. Dipole-assisted thermotics not only offers a distinct mechanism to achieve thermal invisibility, but also has potential applications in thermal management such as infrared signature reduction, thermal protection, and infrared camouflage.
在过去的十年中，热超材料这一新兴领域的热管理取得了相当大的进展。然而，两个严重的问题仍然阻碍了热超材料的发展。也就是说，热导率应该像相应理论所要求的那样是奇异的和不常见的。为了解决这些问题，我们在这里建立了偶极子辅助热动力学理论。通过调整热偶极矩，可以在不需要奇异和不常见的热导率的情况下实现热隐形。此外，有限元模拟和实验室实验都验证了理论分析。偶极子驱动方案在二维和三维、稳态和瞬态都有很好的性能。偶极子辅助热动力学不仅提供了一种实现热隐形的独特机制，而且在热管理如红外特征减少、热保护和红外伪装等方面具有潜在的应用。
