In the realm of quantum material research, the exploration of potential high-speed optoelectronic device applications through the utilization of terahertz pulses for the ultrafast and coherent manipulation of polarization dipoles in materials has emerged as a cutting-edge frontier. Traditional approaches have predominantly hinged on soft phonon modes that resonate with the frequencies of terahertz pulses. However, this reliance has confined their applicability to temperatures in close proximity to the ferroelectric phase transition, thereby imposing limitations on the operational temperature range.

The groundbreaking discovery of topological structures, exemplified by polar skyrmions in PbTiO3/SrTiO3 superlattices, has paved the way for a novel mechanism. This mechanism enables terahertz coupling and manipulation to be conducted across an extensive temperature spectrum and with remarkable efficiency. This is attributed to the collective dynamic modes of these topological structures, which operate within the sub-terahertz frequency band.