Attosecond strobing of two-surface population dynamics in dissociating H2+ |
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Authors: | Staudte A Pavici? D Chelkowski S Zeidler D Meckel M Niikura H Schöffler M Schössler S Ulrich B Rajeev P P Weber Th Jahnke T Villeneuve D M Bandrauk A D Cocke C L Corkum P B Dörner R |
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Institution: | Institut für Kernphysik, J.W. Goethe Universit?t, D-60486 Frankfurt/Main, Germany. andre.staudte@nrc.ca |
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Abstract: | Using H2+ and D2+, we observe two-surface population dynamics by measuring the kinetic energy of the correlated ions that are created when H2+ (D2+) ionize in short (40-140 fs) and intense (10(14) W/cm2) infrared laser pulses. Experimentally, we find a modulation of the kinetic energy spectrum of the correlated fragments. The spectral progression arises from a hitherto unexpected spatial modulation on the excited state population, revealed by Coulomb explosion. By solving the two-level time-dependent Schr?dinger equation, we show that an interference between the net-two-photon and the one-photon transition creates localized electrons which subsequently ionize. |
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