Weak signal enhancement by nonlinear resonance control in a forced nano-electromechanical resonator

Chowdhury, A., Clerc, M. G., Barbay, S., Robert-Philip, I., Braive, R.

Abstract

Driven non-linear resonators can display sharp resonances or even multistable behaviours amenable to induce strong enhancements of weak signals. Such enhancements can make use of the phenomenon of vibrational resonance, whereby a weak low-frequency signal applied to a bistable resonator can be amplified by driving the non-linear oscillator with another appropriately-adjusted non-resonant high-frequency field. Here we demonstrate experi- mentally and theoretically a significant resonant enhancement of a weak signal by use of a vibrational force, yet in a monostable system consisting of a driven nano-electromechanical nonlinear resonator. The oscillator is subjected to a strong quasi-resonant drive and to two additional tones: a weak signal at lower frequency and a non-resonant driving at an inter- mediate frequency. We analyse this phenomenon in terms of coherent nonlinear resonance manipulation. Our results illustrate a general mechanism which might have applications in the fields of microwave signal amplification or sensing for instance.

Más información

Título de la Revista: NATURE COMMUNICATIONS
Volumen: 11
Número: 2400
Editorial: NATURE PORTFOLIO
Fecha de publicación: 2020
Página de inicio: 2400
Página final: 2040
Idioma: Ingles
URL: https://www.nature.com/articles/s41467-020-15827-3
DOI:

https://www.nature.com/articles/s41467-020-15827-3

Notas: ISI WOS