Time-resolved near-edge x-ray absorption fine structure spectroscopy on photo-induced phase transitions using a tabletop soft-x-ray spectrometer.
We present a table-top soft-x-ray spectrometer for the wavelength range λ = 1-5 nm based on a stable laser-driven x-ray source, making use of a gas-puff target. With this setup, optical light-pump/soft-x-ray probe near-edge x-ray absorption fine structure (NEXAFS) experiments with a temporal resolution of about 230 ps are feasible. Pump-probe NEXAFS measurements were carried out in the "water-window" region (2.28 nm-4.36 nm) on the manganite Pr(0.7)Ca(0.3)MnO(3), investigating diminutive changes of the oxygen K edge that derive from an optically induced phase transition. The results show the practicability of the table-top soft-x-ray spectrometer on demanding investigations so far exclusively conducted at synchrotron radiation sources.
Laser-Laboratorium Göttingen e.V., Hans-Adolf-Krebs-Weg 1, D-37077 Göttingen, Germany. peter.grossmann@llg-ev.de
P
P
Grossmann
I
I
Rajkovic
R
R
Moré
J
J
Norpoth
S
S
Techert
C
C
Jooss
Klaus
K
Mann
D000042:Absorption; D004583:Electrons; D005240:Feasibility Studies; D008027:Light; D017895:Manganese Compounds / Q000737:chemistry; D055620:Optical Phenomena; D010100:Oxygen / Q000737:chemistry; D044367:Phase Transition; D056928:X-Ray Absorption Spectroscopy / Q000295:instrumentation*
D017895:Manganese Compounds; C494384:manganite; D010100:Oxygen