Manipulation of geometric nonlinearity to probe nonlinear damping in 2D NEMS

Nonlinearity is inherent in nano mechanical (NEMS) devices. NEMS with high geometric aspect ratio are prone to these nonlinearities. Understanding the role of nonlinearities in the NEMS devices is essential to harvest the maximum benefit from them. In the current work, we probe the nonlinear damping by manipulating the effective Duffing (cubic) nonlinearity using electrical means. We take advantage of tuning of the nonlinearities with strain to minimize the effect of duffing non-linearity thus enabling the study of the effect of nonlinear damping. We use this technique to study the effect of non-linear damping in parametric oscillation regime in 2D material based NEMS resonators.