期刊
OPTICS LETTERS
卷 38, 期 19, 页码 3743-3746出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003743
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资金
- National Basic Research Program of China (973 Program) [2011CB013000]
- National Natural Science Foundation of China (NSFC) [90923039, 51025521]
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. (C) 2013 Optical Society of America
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