Tracking attosecond electronic coherences using phase-manipulated extreme ultraviolet pulses

01 Pubblicazione su rivista
Wituschek Andreas, Bruder Lukas, Allaria Enrico, Bangert Ulrich, Binz Marcel, Borghes Roberto, Callegari Carlo, Cerullo Giulio, Cinquegrana Paolo, Giannessi Luca, Danailov Miltcho, Demidovich Alexander, Di Fraia Michele, Drabbels Marcel, Feifel Raimund, Laarmann Tim, Michiels Rupert, Mirian Najmeh Sadat, Mudrich Marcel, Nikolov Ivaylo, O'Shea Finn H, Penco Giuseppe, Piseri Paolo, Plekan Oksana, Prince Kevin Charles, Przystawik Andreas, Ribič Primož Rebernik, Sansone Giuseppe, Sigalotti Paolo, Spampinati Simone, Spezzani Carlo, Squibb Richard James, Stranges Stefano, Uhl Daniel, Stienkemeier Frank
ISSN: 2041-1723

The recent development of ultrafast extreme ultraviolet (XUV) coherent light sources bears great potential for a better understanding of the structure and dynamics of matter. Promising routes are advanced coherent control and nonlinear spectroscopy schemes in the XUV energy range, yielding unprecedented spatial and temporal resolution. However, their implementation has been hampered by the experimental challenge of generating XUV pulse sequences with precisely controlled timing and phase properties. In particular, direct control and manipulation of the phase of individual pulses within an XUV pulse sequence opens exciting possibilities for coherent control and multidimensional spectroscopy, but has not been accomplished. Here, we overcome these constraints in a highly time-stabilized and phase-modulated XUV-pump, XUV-probe experiment, which directly probes the evolution and dephasing of an inner subshell electronic coherence. This approach, avoiding any XUV optics for direct pulse manipulation, opens up extensive applications of advanced nonlinear optics and spectroscopy at XUV wavelengths.

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