Two-dimensional phonon engineering triggers microscale thermal functionalities

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 1071-1073
• 页数: 3页
• 语种: 英文
• DOI: 10.1093/nsr/nwz114

摘要

Thermal metamaterials enable heat-flow manipulation alongside many emerging thermal functionalities.However,macroscale experimental performances are usually less satisfactory due to the errors of effective medium design,imprecision fabrication and the nonnegligible thermal-contact resistance.In the Nano Letters paper [1],Wu and coworkers propose the ion-write micro-thermotics (IWMT) platform,on which they overcome the issues in the macroscale and experimentally demonstrate the microscale thermal cloak and rectifier functionalities.The fundamental progress is the successful experimental demonstration of two-dimensional (2D) phonon engineering,which can be applied to explore more microscale thermal functionalities and reveal more physics with newly-added spatial phonon-distribution information.To highlight the progress,this perspective shares the status,challenges and potential directions to facilitate discussion and research on thermal metamaterials and phonon engineering.