Detecting electronic coherence by multidimensional broadband stimulated x-ray Raman signals
- Author(s): Dorfman, KE
- Bennett, K
- Mukamel, S
- et al.
Published Web Locationhttps://doi.org/10.1103/PhysRevA.92.023826
© 2015 American Physical Society. ©2015 American Physical Society. Nonstationary molecular states which contain electronic coherences can be impulsively created and manipulated by using recently developed ultrashort optical and x-ray pulses via photoexcitation, photoionization, and Auger processes. We propose several stimulated-Raman detection schemes that can monitor the subsequent phase-sensitive electronic and nuclear dynamics. Three detection protocols of an x-ray broadband probe are compared: frequency-dispersed transmission, integrated photon number change, and total pulse energy change. In addition, each can be either linear or quadratic in the x-ray probe intensity. These various signals offer different gating windows into the molecular response, which is described by correlation functions of electronic polarizabilities. Off-resonant and resonant signals are compared.
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