Published January 1, 2018
| Version v1
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Spatio-temporal dynamics of femtosecond laser pulses at 1550 nm wavelength in crystal silicon
Creators
- 1. NAS Ukraine, Inst Phys, Prospect Nauky 46, UA-03680 Kiev, Ukraine
- 2. Bilkent Univ, Dept Phys, Ankara, Turkey
Description
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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