Stress-induced polarity inversion of crystal quartz using a quasi-phase matching (QPM) stamp is proposed for a QPM frequency conversion quartz device. Fabrication of QPM structure in x-cut quartz plate could be realized using the periodically patterned QPM stamp. Also, second-harmonic 532 nm generation with 16.8 kW peak intensity was demonstrated using a QPM quartz device with QPM period of 124 µm (3rd-order QPM) to confirm its polarity-inverted structure.

中文翻译：

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使用准相位匹配图章反转石英晶体的极性

针对QPM频率转换石英器件，提出了使用准相位匹配（QPM）印模的应力诱导的石英晶体极性反转。使用周期性图案化的QPM压模可以在x切割石英板上制造QPM结构。另外，使用QPM周期为124 µm（三阶QPM）的QPM石英器件证明了峰值强度为16.8 kW的二次谐波532 nm的产生，以确认其极性反转的结构。