KTP晶体具有很高的电导率，给利用外加电场法进行周期极化反转带来困难。
The periodical polarization reversion of KTP crystal utilizing electric field suffers from it's high conductivity.
采用电脉冲极化方法制作出周期性反转电畴微结构。
The microstructure of periodical reversal ferroelectric domain was produced by means of the electric impulse polarization.
本文利用铁电晶体自发极化产生的强大周期性表面势，首次提出新的自由电子激光原理。
A new principle for free electron lasers is proposed for the first time by using very strong surface periodic potential caused by the spontaneous polarization of ferroelectric single crystals.
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