Spatio-temporal modification of femtosecond focal spot under tight focusing condition

0455744 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Jeong, Tae Moon - Weber, Stefan A. - Le Garrec, Bruno - Margarone, Daniele - Mocek, Tomáš - Korn, Georg
Spatio-temporal modification of femtosecond focal spot under tight focusing condition.
Optics Express. Roč. 23, č. 9 (2015), s. 11641-11656. ISSN 1094-4087
Grant CEP: GA MŠMT ED1.1.00/02.0061
Grant ostatní: ELI Beamlines(XE) CZ.1.05/1.1.00/02.0061; AVČR(CZ) M100101210
Institucionální podpora: RVO:68378271
Klíčová slova: electromagnetic waves * paraboloid mirrors * high-contrast * generation * intensity * optics
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 3.148, rok: 2015

The focusing property of a focal spot of a femtosecond laser pulse is presented under tight focusing conditions (below f-number of 1). The spatial and temporal intensity distributions of a focused electric field are calculated by vector diffraction integrals and coherent superposition method. The validity of the calculation method is examined by comparing the intensity distribution obtained under a high f-number condition to that obtained with the fast Fourier transform method that assumes the scalar paraxial approximation. The spatial and temporal modifications under tight focusing conditions are described for a focused femtosecond laser pulse. The calculation results show that a peak intensity of about 2.5x10(24) W/cm(2) can be achievable by tightly focusing a 12-fs, 10 PW laser pulse with a f/0.5 parabolic optic.
Trvalý link: http://hdl.handle.net/11104/0256368