Frequency Comb from a Single Driven Nonlinear Nanomechanical Mode
Frequency Comb from a Single Driven Nonlinear Nanomechanical Mode
复制标题
单驱动非线性纳米机械模式的频率梳
DOI:
10.1103/physrevx.12.041019
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发表时间:
2022
影响因子:
12.5
通讯作者:
Weig, E. M.
中科院分区:
文献类型:
--
作者:
Ochs, J. S.;Boneß, D. K. J.;Rastelli, G.;Seitner, M.;Belzig, W.;Dykman, M. I.;Weig, E. M.
Phononic frequency combs have attracted 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. 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 the anharmonic part of the mode potential energy remains small. We relate the experimental observation to a negative nonlinear friction induced by the resonant drive, which makes the vibrations at the drive frequency unstable. We directly map the measured 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. They demonstrate new sides of the interplay of conservative and dissipative nonlinearities in driven systems.
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