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arXiv 2103.13008cond-mat.mes-hallphysics.class-ph
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横向声波在硅片上的隧穿

Tunnelling of transverse acoustic waves on a silicon chip

Nicolas P. Mauranyapin, Erick Romero, Rachpon Kalra, Glen Harris, Christopher G. Baker, Warwick P. Bowen

摘要:

用于横向声波的纳米机械电路有望实现计算、精密生化传感和许多其他应用的新方法。然而,由于缺乏对纳米机械元件之间的耦合的精确控制,进展受到阻碍。在这里,我们展示了虚拟声子之间的耦合横向机械元件,利用隧道通过零模式的声屏障。这允许在硅芯片上构建大规模纳米机械电路,为此我们开发了一种新的可扩展制造技术。作为示例应用,我们建立了具有可控反射率的模式选择声镜,并演示了声学空间模式滤波。我们的工作为全纳米机械计算机处理器和分布式纳米机械传感器等应用铺平了道路,并探索了非线性纳米机械动力学的丰富景观。

英文摘要:

Nanomechanical circuits for transverse acoustic waves promise to enable new approaches to computing, precision biochemical sensing and many other applications. However, progress is hampered by the lack of precise control of the coupling between nanomechanical elements. Here, we demonstrate virtual-phonon coupling between transverse mechanical elements, exploiting tunnelling through a zero-mode acoustic barrier. This allows the construction of large-scale nanomechanical circuits on a silicon chip, for which we develop a new scalable fabrication technique. As example applications, we build mode-selective acoustic mirrors with controllable reflectivity and demonstrate acoustic spatial mode filtering. Our work paves the way towards applications such as fully nanomechanical computer processors and distributed nanomechanical sensors, and to explore the rich landscape of nonlinear nanomechanical dynamics.

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