Opt Lett. 2013 Oct 1;38(19):3743-6. doi: 10.1364/OL.38.003743.
This study proposes a method for adjusting subwavelength ripple periods and the corresponding double-grating structures formed on fused silica by designing femtosecond laser pulse trains based on localized transient electron density control. Four near-constant period ranges of 190-490 nm of ripples perpendicular to the polarization are obtained by designing pulse trains to excite and modulate the surface plasmon waves. In the period range of 350-490 nm, the double-grating structure is fabricated in one step, which is probably attributable to the grating-assisted enhanced energy deposition and subsequent thermal effects.
本研究提出了一种通过基于局域瞬态电子密度控制的飞秒激光脉冲串设计来调整亚波长波纹周期和在熔融石英上形成的相应双光栅结构的方法。通过设计脉冲串来激发和调制表面等离激元波，获得了四个垂直于偏振方向的近恒定周期范围为 190-490nm 的波纹。在 350-490nm 的周期范围内，一步制备了双光栅结构，这可能归因于光栅辅助增强的能量沉积和随后的热效应。
