Multiple current reversals and giant vibrational resonance in a high-frequency modulated periodic device

A deterministic optical rocking ratchet driven by both high-and low-frequency signals is investigated. First, the phenomenon of multiple current reversals is observed by tuning the amplitude of the high-frequency forcing. Additionally, the giant vibrational resonance arises where the amplitude of the weak low-frequency signal is amplified by several orders of magnitude. The relationship between the multiple current reversals and the giant vibrational resonance is revealed by a high-frequency renormalization mechanism.