We report a multi-mode resonator in which a metal beam can realize self-excited vibration in a steady electrostatic field between two electrodes under DC (direct current) voltage. The beam's self-excited vibration can achieve mode transition and frequency jump when the DC voltage is changed. By gradually increasing the DC voltage by 10%, the frequency output can suddenly jump to 5 times of its original value with the vibration mode transitioning from the first-order to the second-order. The sharp frequency jump due to voltage variations has great potential in applications of highly sensitive sensors and multi-mode actuators.
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