POLARIZED SHEARING HOLOGRAPHIC-MOIR INTERFEROMETRY

A new holographic-moirè method is presented to obtain the in-plane strain fringe patterns. During the recording,double object beams and dual reference beams of orthogonally polarized state are used to illuminate the object and the holographic plate,respectively.Two carriers modulated by deformation are obtained through double-exposure or in real time.Pure in-plane displacement derivative patterns are then obtained through twice filtering.

晶格失配应变对铁电薄膜铁电性能的影响

采用与时间有关的Ginzburg-Landau方程,在考虑表面效应的条件下研究了晶格失配应变对外延铁电薄膜铁电性能的影响,通过外推长度考虑表面效应。获得了不同应变情况下的铁电薄膜电滞回线及蝶形应变迟滞回线。结果表明,剩余极化强度和矫顽场与压应变和张应变密切相关,其值强烈依赖于晶格失配应变。