Hexagonal Boron Nitride Phononic Crystal Waveguides
Hexagonal Boron Nitride Phononic Crystal Waveguides
复制标题
DOI：
10.1021/acsphotonics.9b01094
复制
发表时间：
2019-10
期刊：
影响因子：
7
通讯作者：
Yanan Wang;Jaesung Lee;Xu-Qian Zheng;Yong Xie;P. Feng
中科院分区：
文献类型：
--
作者：
Yanan Wang;Jaesung Lee;Xu-Qian Zheng;Yong Xie;P. Feng
六方氮化硼（h-BN）是一种典型的货车德瓦耳斯（vdW）层状晶体，具有一系列吸引人的物理性质，在探索二维（2D）电子学、光子学、力学和新兴量子工程中发挥着越来越重要的作用。在这里，我们报告的示范h-BN声子晶体波导与设计的通带和阻带在射频（RF）范围和可控的波传播和传输，利用阵列耦合h-BN纳米机械谐振器与工程耦合强度。实验测量证实，这些声子晶体波导限制和支持15至24兆赫（MHz）的波传播超过1.2毫米。类似于固态原子晶格，在h-BN声子波导中观察到声子带隙和色散行为，并对其进行了系统的研究。在这样的可添加集成的h-BN平台上引导和操纵声波可以促进多物理耦合和信息转导，并通过新兴的h-BN光子和声子器件为相干芯片上信号处理和通信开辟新的机会。
Hexagonal boron nitride (h-BN), one of the hallmark van der Waals (vdW) layered crystals with an ensemble of attractive physical properties, is playing increasingly important roles in exploring two-dimensional (2D) electronics, photonics, mechanics, and emerging quantum engineering. Here, we report on the demonstration of h-BN phononic crystal waveguides with designed pass and stop bands in the radio frequency (RF) range and controllable wave propagation and transmission, by harnessing arrays of coupled h-BN nanomechanical resonators with engineerable coupling strength. Experimental measurements validate that these phononic crystal waveguides confine and support 15 to 24 megahertz (MHz) wave propagation over 1.2 millimeters. Analogous to solid-state atomic crystal lattices, phononic bandgaps and dispersive behaviors have been observed and systematically investigated in the h-BN phononic waveguides. Guiding and manipulating acoustic waves on such additively integratable h-BN platform may facilitate multiphysical coupling and information transduction, and open up new opportunities for coherent on-chip signal processing and communication via emerging h-BN photonic and phononic devices.