Toroidal polar topology in strained ferroelectric polymer
Mengfan Guo, Changqing Guo, Jian Han, Shulin Chen, Shan He, Tongxiang Tang, Qian Li, Joseph Strzalka, Jing Ma, Di Yi, Ke Wang, Ben Xu, Peng Gao, Houbing Huang, Long‐Qing Chen, Shujun Zhang, Yuanhua Lin, Ce‐Wen Nan, Yang Shen
Abstract
-trifluoroethylene) [P(VDF-TrFE)], that exhibits concentric topology with anticoupled chiral domains. The interplay among the elastic, electric, and gradient energies results in continuous rotation and toroidal assembly of the polarization perpendicular to polymer chains, whereas relaxor behavior is induced along polymer chains. Such toroidal polar topology gives rise to periodic absorption of polarized far-infrared (FIR) waves, enabling the manipulation of the terahertz wave on a mesoscopic scale. Our observations should inform design principles for flexible ferroic materials toward complex topologies and provide opportunities for multistimuli conversions in flexible electronics.