期刊
OPTICS EXPRESS
卷 21, 期 20, 页码 24185-24190出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.024185
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资金
- National Science Foundation
- US Army Research Office
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068604] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1131627] Funding Source: National Science Foundation
We report on the experimental results of 300 nm features generated on fused silica using a near-infrared (IR) femtosecond laser pulse initiated by an ultraviolet (UV) pulse. With both pulses at a short (similar to 60 fs) delay, the damage threshold of the UV pulse is only 10% of its normal value. Considerable reduction of UV damage threshold is observed when two pulses are at +/- 1.3 ps delay. The damage feature size of the combined pulses is similar to that of a single UV pulse. A modified rate equation model with the consideration of defect states is used to help explain these results. This concept can be applied to shorter wavelengths, e.g. XUV and X-ray, with the required fluence below their normal threshold. (C)2013 Optical Society of America
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