Frequency Comb from a Single Driven Nonlinear Nanomechanical Mode

Year: 2022

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

Autors Affiliation: Univ Konstanz, Dept Phys, D-78457 Constance, Germany; CNR INO, Pitaevskii Ctr Bose Einstein Condensat, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Trento, Italy; Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA; Tech Univ Munich, Sch Computat Informat & Technol, Dept Elect Engn, D-85748 Garching, Germany; Munich Ctr Quantum Sci & Technol MCQST, D-80799 Munich, Germany; TUM Ctr Quantum Engn ZQE, D-85748 Garching, Germany.

Abstract: 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.

Journal/Review: PHYSICAL REVIEW X

Volume: 12 (4)      Pages from: 041019-1  to: 041019-8

More Information: We are grateful to S. W. Shaw for a useful discussion. J. S. O., D. K. J. B., W. B., and E. M. W. gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project -ID No. 425217212-SFB 1432. J. S. O. and E. M. W. further acknowledge funding from the European Union
KeyWords: nanomechanics, nonlinear resonators, frequency combs
DOI: 10.1103/PhysRevX.12.041019

ImpactFactor: 12.500
Citations: 13
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