Reconfigurable, zero-energy, and wide-temperature loss-assisted thermal nonreciprocal metamaterials
成果类型：
Article
署名作者：
Lei, Min; Jin, Peng; Zhou, Yuhong; Li, Ying; Xu, Liujun; Huang, Jiping
署名单位：
Fudan University; Fudan University; Zhejiang University; Zhejiang University; Zhejiang University; Chinese Academy of Engineering Physics
刊物名称：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN/ISSBN：
0027-10195
DOI：
10.1073/pnas.2410041121
发表日期：
2024-10-29
关键词：
摘要：
Thermal nonreciprocity plays a vital role in chip heat dissipation, energy-saving design, and high-temperature hyperthermia, typically realized through the use of advanced metamaterials with nonlinear, advective, spatiotemporal, or gradient properties. However, challenges such as fixed structural designs with limited adjustability, high energy consumption, and a narrow operational temperature range remain prevalent. Here, a systematic framework is introduced to achieve reconfigurable, zero-energy, and wide-temperature thermal nonreciprocity by transforming wasteful heat loss into a valuable regulatory tool. Vertical slabs composed of natural bulk materials enable asymmetric heat loss through natural convection, disrupting the inversion symmetry of thermal conduction. The reconfigurability of this system stems from the ability to modify heat loss by adjusting thermal conductivity, size, placement, and quantity of the slabs. Moreover, this structure allows for precise control of zeroenergy thermal nonreciprocity across a broad temperature spectrum, utilizing solely research presents a different approach to achieving nonreciprocity, broadening the potential for nonreciprocal devices such as thermal diodes and topological edge states, and inspiring further exploration of nonreciprocity in other loss-based systems.