Infrared–x-ray pump-probe spectroscopy of the NO molecule
2005 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 72, no 1, 012714Article in journal (Refereed) Published
Two color infrared-x-ray pump-probe spectroscopy of the NO molecule is studied theoretically and numerically in order to obtain a deeper insight of the underlying physics and of the potential of this suggested technology. From the theoretical investigation a number of conclusions could be drawn: It is found that the phase of the infrared field strongly influences the trajectory of the nuclear wave packet, and hence, the x-ray spectrum. The trajectory experiences fast oscillations with the vibrational frequency with a modulation due to the anharmonicity of the potential. The dependences of the x-ray spectra on the delay time, the duration, and the shape of the pulses are studied in detail. It is shown that the x-ray spectrum keep memory about the infrared phase after the pump field left the system. This memory effect is sensitive to the time of switching-off the pump field and the Rabi frequency. The phase effect takes maximum value when the duration of the x-ray pulse is one-fourth of the infrared field period, and can be enhanced by a proper control of the duration and intensity of the pump pulse. The manifestation of the phase is different for oriented and disordered molecules and depends strongly on the intensity of the pump radiation.
Place, publisher, year, edition, pages
2005. Vol. 72, no 1, 012714
synchrotron-radiation, laser, pulses, simulation, generation, dynamics, spectra, phase
IdentifiersURN: urn:nbn:se:kth:diva-5650DOI: 10.1103/PhysRevA.72.012714ISI: 000230887300094ScopusID: 2-s2.0-27144550517OAI: oai:DiVA.org:kth-5650DiVA: diva2:10088
QC 201008252006-05-052006-05-052016-07-22Bibliographically approved