Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Polynkin, Pavel"'
We formulate a multi-physics model to describe the nonlinear propagation of a femtosecond, near-infrared, tightly focused laser pulse in a transparent dielectric. The application of our model to the case of bulk sapphire shows that even under extreme
Externí odkaz:
http://arxiv.org/abs/2306.12524
We pump low-pressure nitrogen gas with ionizing femtosecond laser pulses at 1.5 mu m wavelength. The resulting rotationally excited N-2(+) 2 molecular ions generate directional, forward-propagating stimulated and isotropic spontaneous emissions at 42
Externí odkaz:
http://hdl.handle.net/10150/626190
http://arizona.openrepository.com/arizona/handle/10150/626190
http://arizona.openrepository.com/arizona/handle/10150/626190
Autor:
Polynkin, Pavel
Channeling an extended electrical breakdown of air by a laser beam is a long-standing challenge in applied laser science. Virtually all previously reported experiments on discharge channeling by femtosecond laser beams relied on the application of a
Externí odkaz:
http://hdl.handle.net/10150/626071
http://arizona.openrepository.com/arizona/handle/10150/626071
http://arizona.openrepository.com/arizona/handle/10150/626071
We quantify the dependence of the single-shot ablation threshold on the angle of incidence and polarization of a femtosecond laser beam, for three dissimilar solid-state materials: a metal, a dielectric, and a semiconductor. Using the constant, linea
Externí odkaz:
http://hdl.handle.net/10150/622151
http://arizona.openrepository.com/arizona/handle/10150/622151
http://arizona.openrepository.com/arizona/handle/10150/622151
Autor:
Panov, Nikolay A., Shipilo, Daniil E., Andreeva, Vera A., Kosareva, Olga G., Saletsky, Alexander M., Xu, Huailiang, Polynkin, Pavel
Through numerical simulations we reveal the scenario of 3.9-mu m filament spectrum enrichment in the atmosphere in the cases of linear and circular polarization of the incident pulse. The discrete spectrum of odd harmonics transforms into the two-oct
Externí odkaz:
http://hdl.handle.net/10150/621548
http://arizona.openrepository.com/arizona/handle/10150/621548
http://arizona.openrepository.com/arizona/handle/10150/621548
The propagation of intense picosecond laser pulses in air in the presence of strong nonlinear self-action effects and air ionization is investigated experimentally and numerically. The model used for numerical analysis is based on the nonlinear propa
Externí odkaz:
http://hdl.handle.net/10150/621795
http://arizona.openrepository.com/arizona/handle/10150/621795
http://arizona.openrepository.com/arizona/handle/10150/621795
Autor:
Jutas Rokas, Roman Joris, Astrauskas Ignas, Imani Aref, Carpeggiani Paolo, Polynkin Pavel, Kaksis Edgar, Floery Tobias, Kolenda Jonas, Bartulevičius Tadas, Michailovas Kirilas, Michailovas Andrejus, Baltuška Andrius, Pugžlys Audrius
Publikováno v:
EPJ Web of Conferences, Vol 307, p 04045 (2024)
Non-collinearly-seeded, KTA-based NOPCPA is used to generate multicolor, angularly separated pump pulses above 2 μm wavelength. These multicolor pump channels are used to amplify LWIR pulses in a non-collinearly-pumped ZGP NOPCPA to sub-mJ level, wi
Externí odkaz:
https://doaj.org/article/a588eaa63bc441daae79ffe735e7ce96
Autor:
Ament, Craig, Johnson, Lee, Schmitt-Sody, Andreas, Lucero, Adrian, Milster, Thomas, Polynkin, Pavel
We report the fabrication of large-area phase masks on thin fused-silica substrates that are suitable for shaping multi-terawatt femtosecond laser beams. We apply these phase masks for the generation of intense femtosecond optical vortices. We furthe
Externí odkaz:
http://arxiv.org/abs/1402.7069
Publikováno v:
In Applied Surface Science 15 November 2019 494:1007-1012