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arXiv 2207.04030cond-mat.mes-hallphysics.class-phphysics.optics
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单驱动非线性纳米机械模式的频率梳

Frequency comb from a single driven nonlinear nanomechanical mode

J. S. Ochs, D. K. J. Boness, G. Rastelli, M. Seitner, W. Belzig, M. I. Dykman, E. M. Weig

摘要:

声子频率梳作为振动系统中一种新的非线性现象和应用前景,正引起人们越来越多的关注。人们普遍认为,至少有两种模式必须参与产生一个comb.In本文中,我们证明了一个梳可以产生由一个单一的纳米机械模式驱动的共振单色驱动器。梳齿出现在驱动力仍然很弱的地方,因此模式势能的非谐波部分仍然很小。我们将这种效应与由共振驱动引起的负非线性摩擦有关,这使得在驱动频率下的振动不稳定。我们直接映射的新兴振荡的旋转框架中的轨迹,并显示这些振荡如何导致在实验室框架中的频率梳。这些结果超越了纳米力学,并提出了一种在单模振动系统中产生可调谐频率梳的定性新方法。

英文摘要:

Phononic frequency combs have been attracting an increasing attention both as a qualitatively new type of nonlinear phenomena in vibrational systems and from the point of view of applications. It is commonly believed that at least two modes must be involved in generating a comb. In this paper we demonstrate that a comb can be generated by a single nanomechanical mode driven by a resonant monochromatic drive. The comb emerges where the drive is still weak, so that the anharmonic part of the mode potential energy remains small. We relate the effect to a negative nonlinear friction induced by the resonant drive, which makes the vibrations at the drive frequency unstable. We directly map the trajectories of the emerging oscillations in the rotating frame and show how these oscillations lead to the frequency comb in the laboratory frame. The results go beyond nanomechanics and suggest a qualitatively new approach to generating tunable frequency combs in single-mode vibrational systems.

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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