Zheng Chunqi, Simpson Robert E, Tang Kechao, Ke Yujie, Nemati Arash, Zhang Qing, Hu Guangwei, Lee Chengkuo, Teng Jinghua, Yang Joel K W, Wu Junqiao, Qiu Cheng-Wei
Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.
NUS Graduate School, National University of Singapore, Singapore 119077, Singapore.
Chem Rev. 2022 Oct 12;122(19):15450-15500. doi: 10.1021/acs.chemrev.2c00171. Epub 2022 Jul 27.
Phase transitions can occur in certain materials such as transition metal oxides (TMOs) and chalcogenides when there is a change in external conditions such as temperature and pressure. Along with phase transitions in these phase change materials (PCMs) come dramatic contrasts in various physical properties, which can be engineered to manipulate electrons, photons, polaritons, and phonons at the nanoscale, offering new opportunities for reconfigurable, active nanodevices. In this review, we particularly discuss phase-transition-enabled active nanotechnologies in nonvolatile electrical memory, tunable metamaterials, and metasurfaces for manipulation of both free-space photons and in-plane polaritons, and multifunctional emissivity control in the infrared (IR) spectrum. The fundamentals of PCMs are first introduced to explain the origins and principles of phase transitions. Thereafter, we discuss multiphysical nanodevices for electronic, photonic, and thermal management, attesting to the broad applications and exciting promises of PCMs. Emerging trends and valuable applications in all-optical neuromorphic devices, thermal data storage, and encryption are outlined in the end.
当温度和压力等外部条件发生变化时，某些材料（如过渡金属氧化物（TMOs）和硫族化物）会发生相变。随着这些相变材料（PCM）中的相变，各种物理性质会出现显著差异，这可用于在纳米尺度上操控电子、光子、极化子和声子，为可重构有源纳米器件提供新机遇。在本综述中，我们特别讨论了在非易失性电存储器中基于相变的有源纳米技术、用于操控自由空间光子和面内极化子的可调超材料和超表面，以及红外（IR）光谱中的多功能发射率控制。首先介绍PCM的基本原理，以解释相变的起源和原理。此后，我们讨论用于电子、光子和热管理的多物理纳米器件，证明PCM的广泛应用和令人兴奋的前景。最后概述了全光神经形态器件、热数据存储和加密方面的新兴趋势和有价值的应用。
