Bias voltage-tunable existence boundaries of phononic frequency combs in nonlinear mechanical resonators based on 2D materials —An analytical study

Phononic frequency combs enable the extension of frequency-comb concepts to the domain of mechanical vibrations through nonlinear modal interactions. Here, we explore the possibility of active control of the existence boundaries of phononic frequency combs via DC bias voltage. The bias-induced modification of modal frequencies and nonlinear coupling of an electrostatically actuated MoS2 resonator modulate the energy exchange pathways that enable comb formation, thus allowing for programmable regulation of the existence boundaries. This study thus provides a theoretical framework for the design and optimization of electrically tunable phononic frequency combs in signal processing and sensing devices within the MEMS/NEMS domain.