期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 124, 期 8, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-018-1986-6
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资金
- NAS of Ukraine
- Scientific and Technological Research Council of Turkey (TUBITAK) [114F256]
- Ukrainian State Fund for Fundamental Research [F73/23805]
- Science and Technology Center in Ukraine [6174]
Spatio-temporal transformation of the femtosecond laser pulses at 1550 nm wavelength in c-Si is observed using the methods of time-resolved microscopy. The temporal dynamics of the pulse manifests itself both in widening of the frequency spectrum and in the change of on-axis time-width. It is shown, that along with Kerr effect, two-photon absorption also contributes to the temporal reshaping of the laser pulse. Despite the fact that absorption length for green light in c-Si is as small as 1 A mu m, generation of visible third harmonics was also observed in c-Si.
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