The formation process of self-organized nanograting in fused silica glass with femtosecond laser (1 kHz, 120 fs, 800 nm) double-pulse sequences irradiation is investigated by combined control of polarization state of individual pulse, interpulse temporal delay (from −330 to 350 ps) and energy ratio in each sequence. It is found that the as-formed nanograting induced by the first pulse can be erased by the second pulse in repeated sequences irradiation, and moreover a new one is be rewritten in situ if the two pulses in a sequence were temporally well separated. The rewritten nanograting shows a new orientation perpendicular to the polarization direction of the second pulse. Additionally, the erasing and rewriting of nanograting can become more efficient as long as the second pulse energy increases to be higher than the first one, regardless of the interpulse delay. Our result shows that the energy ratio in double-pulse sequences plays a decisive role in the erasing and r...

中文翻译：

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通过超短双脉冲序列在熔融石英中进行自组织纳米光栅的擦除和重写操作

飞秒激光（1 kHz，120 fs，800 nm）双脉冲序列辐照在熔融石英玻璃中自组织纳米光栅的形成过程是通过组合控制单个脉冲的偏振态，脉冲间时间延迟（从-330到350 ps）和每个序列的能量比。已经发现，在重复序列照射中，由第一脉冲诱发的纳米光栅可以被第二脉冲擦除，此外，如果在时序上将两个脉冲暂时分开，则可以原位重写新的纳米光栅。重写的纳米光栅显示出垂直于第二脉冲的偏振方向的新取向。此外，只要第二脉冲能量增加到高于第一脉冲能量，则擦除和重写纳米光栅的效率就会更高。不管脉冲延迟如何。我们的结果表明，双脉冲序列中的能量比在擦除和擦除中起着决定性的作用。