Credit: Alan Stonebraker

Figure 1: (Top) A sketch of the system, which is a pair of $6×0.5×0.2$ $μ$$m$ doubly clamped nanobeams with $400nm$ separation. The beams were illuminated by an infrared laser focused to a spot of $10$ $μ$$m$ and the reflected signal was detected. (Bottom) The effective potential for the slow coordinate $q2$ of the higher-frequency nanobeam for different values of the modulation frequency $ωp$; |$q2$| gives the scaled amplitude of the vibrations at frequency $ωp/2$, whereas the sign of $q2$ determines their phase.