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The optical superlattice structure derived from a periodic poling process endows ferroelectric crystals with tunable optical property regulation, which has become one of the most efficient strategies for fabricating high‐efficiency optical devices. Achieving a precise superlattice structure has been the main barrier for preparation of specific optical applications due to the unclear dynamics of domain...
Nonlinear‐Optical Devices
In article number 2202761, Hong Liu, Yuanhua Sang, Dongzhou Wang, and co‐workers develop a real‐time monitoring system for the in‐situ observation of periodic poling of lithium niobate to investigate ferroelectric domain reversal dynamics. An electrode configuration with multiholes is proposed to use the local electric field more efficiently and controllably, which could...