Stochastic resonance is a general phenomenon that can seem paradoxical at first, whereby noise present or injected in a system can enhance the detection of a small signal. It is usually observed in one-dimensional bistable systems subjected to a small amplitude modulated signal.
In our work recently published in Physical Review Letters, we show experimentally the emergence of phase stochastic resonance in the bidimensional response of a forced nano-electromechanical membrane. It results in the enhancement of a weak phase modulated signal thanks to the addition of phase noise. A theoretical model, confirmed by the experimental measurements, reveals the unusual role of phase noise that acts multiplicatively.
These results may open interesting prospects for phase noise metrology or coherent signal transmission applications in nanomechanical oscillators. Moreover, our approach, due to its general character, may apply to various systems and open novel opportunities for stochastic resonance applications.
Réferences :
Phase Stochastic Resonance in a Forced Nanoelectromechanical Membrane,
Avishek Chowdhury, Sylvain Barbay, Marcel G. Clerc, Isabelle Robert-Philip, & Rémy Braive
Physical Review Letters 119, 234101 (2017) / DOI : https://doi.org/10.1103/PhysRevLett.119.234101
- Article published on ArXiv : https://arxiv.org/abs/1802.00213
Contact:
- Rémy Braive, Assistant Professor Université Paris Diderot at C2N
