Mode coupling bi-stability and spectral broadening in buckled carbon nanotube mechanical resonators.

Autor: Rechnitz S; Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering, Technion, Haifa, 3200003, Israel., Tabachnik T; Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering, Technion, Haifa, 3200003, Israel., Shlafman M; Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering, Technion, Haifa, 3200003, Israel., Shlafman S; Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering, Technion, Haifa, 3200003, Israel., Yaish YE; Andrew and Erna Viterbi Faculty of Electrical and Computer Engineering, Technion, Haifa, 3200003, Israel. yuvaly@technion.ac.il.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Oct 06; Vol. 13 (1), pp. 5900. Date of Electronic Publication: 2022 Oct 06.
DOI: 10.1038/s41467-022-33440-4
Abstrakt: Bi-stable mechanical resonators play a significant role in various applications, such as sensors, memory elements, quantum computing and mechanical parametric amplification. While carbon nanotube based resonators have been widely investigated as promising NEMS devices, a bi-stable carbon nanotube resonator has never been demonstrated. Here, we report a class of carbon nanotube resonators in which the nanotube is buckled upward. We show that a small upward buckling yields record electrical frequency tunability, whereas larger buckling can achieve Euler-Bernoulli bi-stability, the smallest mechanical resonator with two stable configurations to date. We believe that these recently-discovered carbon nanotube devices will open new avenues for realizing nano-sensors, mechanical memory elements and mechanical parametric amplifiers. Furthermore, we present a three-dimensional theoretical analysis revealing significant nonlinear coupling between the in-plane and out-of-plane static and dynamic modes of motion, and a unique three-dimensional Euler-Bernoulli snap-through transition. We utilize this coupling to provide a conclusive explanation for the low quality factor in carbon nanotube resonators at room temperature, key in understanding dissipation mechanisms at the nano scale.
(© 2022. The Author(s).)
Databáze: MEDLINE
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