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arXiv 2401.07047cond-mat.mes-hallcond-mat.mtrl-sciphysics.app-ph
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通过MEMS诱导张力调节二维材料谐振器中的耗散稀释

Tuning dissipation dilution in 2D material resonators by MEMS-induced tension

M. P. F. Wopereis, N. Bouman, S. Dutta, P. G. Steeneken, F. Alijani, G. J. Verbiest

AI总结:

本文提出利用MEMS施加纯面内机械应变来增强二维材料谐振器的谐振频率和Q值,通过耗散稀释实现Q值提升91%,为高性能二维纳米机械传感器及本征损耗机制研究开辟了新路径。

摘要:

基于二维(2D)材料的谐振器具有作为纳米机械传感器的优异特性,使其能够以高频率和高灵敏度工作。然而,其作为纳米机械传感器的性能目前受到低品质因数(Q值)的限制。在此,我们利用微机电系统(MEMS)施加纯面内机械应变,同时提高其谐振频率和Q值。与早期工作相比,二维材料谐振器采用干转移方法在MEMS致动器上制备,不涉及任何湿法加工步骤。通过电子束诱导沉积制备的铂夹持件被证明能有效将二维薄膜固定到MEMS上并防止滑移。通过以纯机械方式对面内薄膜施加应变,我们增加了拉伸能量,从而稀释了耗散。通过这种方式,我们展示了耗散稀释如何将二维材料谐振器的Q值提高91%。所提出的MEMS驱动耗散稀释方法不仅为基于二维材料的谐振器实现更高Q值铺平了道路,还为研究单层极限下二维材料的本征损耗机制提供了一条途径。

英文摘要:

Resonators based on two-dimensional (2D) materials have exceptional properties for application as nanomechanical sensors, which allows them to operate at high frequencies with high sensitivity. However, their performance as nanomechanical sensors is currently limited by their low quality ($Q$)-factor. Here, we make use of micro-electromechanical systems (MEMS) to apply pure in-plane mechanical strain, enhancing both their resonance frequency and Q-factor. In contrast to earlier work, the 2D material resonators are fabricated on the MEMS actuators without any wet processing steps, using a dry-transfer method. A platinum clamp, that is deposited by electron beam-induced deposition, is shown to be effective in fixing the 2D membrane to the MEMS and preventing slippage. By in-plane straining the membranes in a purely mechanical fashion, we increase the tensile energy, thereby diluting dissipation. This way, we show how dissipation dilution can increase the $Q$-factor of 2D material resonators by 91\%. The presented MEMS actuated dissipation dilution method does not only pave the way towards higher $Q$-factors in resonators based on 2D materials, but also provides a route toward studies of the intrinsic loss mechanisms of 2D materials in the monolayer limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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