Sensitivity of nonlinear photoionization to resonance substructure in collective excitation

Mazza, T.; Karamatskou, A.; Ilchen, M.; Bakhtiarzadeh, S.; Rafipoor, A. J.; O’Keeffe, P.; Kelly, T. J.; Walsh, N.; Costello, J. T.; Meyer, M.; Santra, R.

Abstract

Collective behaviour is a characteristic feature in many-body systems, important for developments in fields such as magnetism, superconductivity, photonics and electronics. Recently, there has been increasing interest in the optically nonlinear response of collective excitations. Here we demonstrate how the nonlinear interaction of a many-body system with intense XUV radiation can be used as an effective probe for characterizing otherwise unresolved features of its collective response. Resonant photoionization of atomic xenon was chosen as a case study. The excellent agreement between experiment and theory strongly supports the prediction that two distinct poles underlie the giant dipole resonance. Our results pave the way towards a deeper understanding of collective behaviour in atoms, molecules and solid-state systems using nonlinear spectroscopic techniques enabled by modern short-wavelength light sources.

Citation

Mazza, T., Karamatskou, A., Ilchen, M., Bakhtiarzadeh, S., Rafipoor, A. J., O’Keeffe, P., …Santra, R. (2015). Sensitivity of nonlinear photoionization to resonance substructure in collective excitation. Nature communications, 6(1), 6799-1-6799-6. https://doi.org/10.1038/ncomms7799

• Acceptance Date: Mar 2, 2015
• Online Publication Date: Apr 9, 2015
• Publication Date: Apr 10, 2015
• Deposit Date: Jul 18, 2016
• Publicly Available Date: Jul 18, 2016
• Journal: Nature communications
• Electronic ISSN: 2041-1723
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 1
• Pages: 6799-1-6799-6
• DOI: https://doi.org/10.1038/ncomms7799
• Keywords: Physical sciences, Atomic and molecular physics
• Public URL: https://hull-repository.worktribe.com/output/441123
• Publisher URL: http://www.nature.com/ncomms/2015/150409/ncomms7799/full/ncomms7799.html
• Additional Information: This is a copy of an open access article published in Nature communications, 2016, v.6.