期刊
APPLIED PHYSICS LETTERS
卷 102, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4790284
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资金
- DFG [RO 2074/7-2, KR 3638/1-2]
The formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800 nm center wavelength) is studied experimentally using a transillumination femtosecond time-resolved (0.1 ps-1 ns) pump-probe diffraction approach. This allows to reveal the generation dynamics of near-wavelength-sized LIPSS showing a transient diffraction at specific spatial frequencies even before a corresponding permanent surface relief was observed. The results confirm that the ultrafast energy deposition to the materials surface plays a key role and triggers subsequent physical mechanisms such as carrier scattering into self-trapped excitons. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790284]
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