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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

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Nonlinear effects in a strongly coupled nanoelectromechanical system.

Narges Tarakameh Samani¹, Farhad Shahbazi², Mehdi Abdi²

¹Politecnico di Milano, Dipartimento di Fisica, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.

Physical Review. E

|April 18, 2026

Summary

This summary is machine-generated.

Researchers developed a voltage-controlled model for nanoelectromechanical resonators. This framework enables precise tuning of nonlinear effects, leading to controllable frequency combs for advanced applications.

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Area of Science:

Physics
Engineering
Nonlinear Dynamics

Background:

Controlling nonlinear effects is crucial for micro- and nanoelectromechanical systems (MEMS/NEMS).
NEMS devices offer potential in sensing, signal processing, and frequency control.
Understanding and manipulating nonlinearities is key to device performance.

Purpose of the Study:

To develop a voltage-dependent Hamiltonian framework for NEMS resonators.
To investigate the control of nonlinear effects in coupled vibrational modes.
To establish a dynamical framework for engineering tunable NEMS devices.

Main Methods:

Developed a theoretical model using a voltage-dependent Hamiltonian.
Analyzed a nanoelectromechanical resonator with two strongly coupled vibrational modes (nanostring platform).
Utilized electrostatic tuning with dc voltage to control frequencies, couplings, and interactions.
Applied parametric drive and phase-resolved diagnostics (Kuramoto order parameter, autocorrelation, Poincaré analysis).

Main Results:

The model reproduces experimentally observed avoided crossings.
Tunable frequency-comb spectra were generated with parametric drive.
A phase diagram revealed links between comb formation, bifurcations, multistability, and attractor switching.
Quantified coherence and critical slowing down near transitions.

Conclusions:

Established a dynamical framework for engineering NEMS resonators.
Demonstrated enhanced tunability and functionality through voltage control.
Provided a predictive link between theoretical models and experimental outcomes for NEMS devices.