Water-window soft x-ray high-harmonic generation up to the nitrogen K-edge driven by a kHz, 2.1 mu m OPCPA source

Autor(es)

Stein, Gregory J. ^{[1, 2]} ; Keathley, Phillip D. ^{[1, 2]} ; Krogen, Peter ^{[1, 2]} ; Liang, Houkun ^{[1, 2]} ; Siqueira, Jonathas P. ^{[1, 2, 3]} ; Chang, Chun-Lin ^{[1, 2]} ; Lai, Chien-Jen ^{[1, 2]} ; Hong, Kyung-Han ^{[1, 2]} ; Laurent, Guillaume M. ^{[1, 2]} ; Kaertner, Franz X. ^{[1, 2, 4, 5, 6]}

Afiliação do(s) autor(es)

^[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 - USA

^[2] MIT, Elect Res Lab, Cambridge, MA 02139 - USA

^[3] Univ Sao Paulo, Inst Fs Sao Carlos, Grp Foton, BR-13560970 Sao Paulo, SP - Brazil

^[4] Univ Hamburg, Dept Phys, Hamburg - Germany

^[5] Univ Hamburg, DESY, Ctr Free Electron Laser Sci, Hamburg - Germany

^[6] Hamburg Ctr Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg - Germany

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 49, n. 15 AUG 14 2016.
• Citações Web of Science: 19

Resumo

We report the generation of coherent water-window soft x-ray harmonics in a neon-filled semi-infinite gas cell driven by a femtosecond multi-mJ mid-infrared optical parametric chirped-pulse amplification (OPCPA) system at a 1 kHz repetition rate. The cutoff energy was extended to similar to 450 eV with a 2.1 mu m driver wavelength and a photon flux of similar to 1.5 x 10(6) photons/s/1% bandwidth was obtained at 350 eV. A comparable photon flux of similar to 1.0 x 10(6) photons/s/1% bandwidth was observed at the nitrogen K-edge of 410 eV. This is the first demonstration of water-window harmonic generation up to the nitrogen K-edge from a kHz OPCPA system. Finally, this system is suitable for time-resolved soft x-ray near-edge absorption spectroscopy. Further scaling of the driving pulse's energy and repetition rate is feasible due to the availability of high-power picosecond Yb-doped pump laser technologies, thereby enabling ultrafast, tabletop water-window x-ray imaging. (AU)

• Processo FAPESP: 12/22102-7 - Geração de altos harmônicos com alto fluxo de fótons na região espectral da "janela da água" pela técnica de onda guiada utilizando sistema laser OPCPA operando em 2 µm
• Beneficiário: Jonathas de Paula Siqueira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado