| Full text | |
| Author(s): |
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]
Total Authors: 10
|
| Affiliation: | [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
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 49, n. 15 AUG 14 2016. |
| Web of Science Citations: | 19 |
| Abstract | |
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) | |
| FAPESP's process: | 12/22102-7 - High order harmonic generation with high photon flux in the water window spectral region by the guided wave technique using a 2 µm OPCPA laser system |
| Grantee: | Jonathas de Paula Siqueira |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |