Chandan and Nishta’s work on tuning of nonlinearities using electrostatic gate voltage has now been accepted in Applied Physics Letters.
The work demonstrates the ability to control and manipulate the nonlinearities in ultra-thin resonators. This control over the nonlinearities is used to cancel out the strongest two nonlinearities in the device. This can not only be used to improve the linear dynamic range for NEMS based sensors but can also be used to probe higher order nonlinearities that are typically masked by the quadratic and cubic nonlinearities.
In this work, we observe higher order stiffening nonlinearities as well as some hints of nonlinear damping. Previous reports of nonlinear damping in 2D materials required cooling down to sub 100mK temperatures and quality factor of close to a million. The fact that we are able to see these weak effects at room temperature with modest quality factors of about 100demonstrates the usefulness of results shown in this manuscript.
More in this paper.