Kumar Dushyant, Sharma Raghav, Wang Fei, Liu Yakun, Zhao Shishun, Yang Hyunsoo
Department of Electrical and Computer Engineering, National University of Singapore, 117583, Singapore.
Department of Physics, Netaji Subhas University of Technology, New Delhi 110078, India.
Nano Lett. 2024 Oct 9;24(40):12545-12551. doi: 10.1021/acs.nanolett.4c03517. Epub 2024 Sep 27.
Recent interest in quantum nonlinearity has spurred the development of rectifiers for harvesting energy from ambient radiofrequency waves. However, these rectifiers face efficiency and bandwidth limitations at room temperature. We address these challenges by exploring BiTe, a time-reversal symmetric topological quantum material. BiTe exhibits robust room temperature second-order voltage generation in both the longitudinal and transverse directions. We harness these coexisting nonlinearities to design a multidirectional quantum rectifier that can simultaneously extract energy from various components of an input signal. We demonstrate the efficacy of BiTe-based rectifiers across a broad frequency range, spanning from existing Wi-Fi bands (2.45 GHz) to frequencies relevant to next-generation 5G technology (27.4 GHz). Our BiTe-based rectifier surpasses previous limitations by achieving a high rectification efficiency and operational frequency, alongside a low operational threshold and broadband functionality. These findings enable practical topological quantum rectifiers for high-frequency electronics and energy conversion, advancing wireless energy harvesting for next-generation communication.
最近对量子非线性的关注推动了用于从环境射频波中收集能量的整流器的发展。然而，这些整流器在室温下面临效率和带宽限制。我们通过探索BiTe（一种时间反演对称拓扑量子材料）来应对这些挑战。BiTe在纵向和横向方向上均表现出强大的室温二阶电压产生。我们利用这些共存的非线性来设计一种多向量子整流器，该整流器可以同时从输入信号的各个分量中提取能量。我们展示了基于BiTe的整流器在从现有Wi-Fi频段（2.45 GHz）到与下一代5G技术相关的频率（27.4 GHz）的广泛频率范围内的功效。我们基于BiTe的整流器通过实现高整流效率和工作频率，以及低工作阈值和宽带功能，超越了先前的限制。这些发现为高频电子学和能量转换带来了实用的拓扑量子整流器，推动了下一代通信的无线能量收集。
