| Title | All femtosecond optical pump and x-ray probe: holey-axicon for free electron lasers / |
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| Authors | Anand, V ; Maksimovic, J ; Katkus, T ; Ng, S.H ; Ulčinas, Orestas ; Mikutis, Mindaugas ; Baltrukonis, Justas ; Urbas, Antanas ; Šlekys, G ; Ogura, H ; Sagae, D ; Pikuz, T ; Somekawa, T ; Ozaki, N ; Vailionis, Artūras ; Seniutinas, G ; Mizeikis, V ; Glazebrook, K ; Brodie, J.P ; Stoddart, P.R ; Rapp, L ; Rode, A.V ; Gamaly, E.G ; Juodkazis, S |
| DOI | 10.1088/2515-7647/abd4ef |
| Full Text |
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| Is Part of | Journal of physics-Photonics.. Bristol : IOP Publishing. 2021, vol. 3, iss. 2, art. no. 024002, p. 1-18.. ISSN 2515-7647 |
| Keywords [eng] | X-rays ; free electron laser (FEL) ; ultra-short phenomena ; pump-probe ; warm-dense matter ; astrophotonics ; co-axial volumetric interaction diagnostics |
| Abstract [eng] | We put forward a co-axial pump (optical)-probe (x-rays) experimental concept and show performance of the optical component. A Bessel beam generator with a central 100 µm diameter hole (on the optical axis) was fabricated using femtosecond (fs) laser structuring inside a silica plate. This flat-axicon optical element produces a needle-like axial intensity distribution which can be used for the optical pump pulse. The fs-x-ray free electron laser (X-FEL) beam of sub-1 µm diameter can be introduced through the central hole along the optical axis onto a target as a probe. Different realisations of optical pump are discussed. Such optical elements facilitate alignment of ultra-short fs-pulses in space and time and can be used in light–matter interaction experiments at extreme energy densities on the surface and in the volume of targets. Full advantage of ultra-short 10 fs-X-FEL probe pulses with fs-pump (optical) opens an unexplored temporal dimension of phase transitions and the fastest laser-induced rates of material heating and quenching. A wider field of applications of fs-laser-enabled structuring of materials and design of specific optical elements for astrophotonics is presented. |
| Published | Bristol : IOP Publishing |
| Type | Journal article |
| Language | English |
| Publication date | 2021 |
| CC license |
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