The image potential state lifetime at the graphene/Ir(111) interface has been measured by tuning the pump photon energy on- and off-resonance for the optical transition between the surface state and the image state. By a joint effort of time resolved non-linear photoemission measurements and Optical Bloch Equations results, we astonishingly show that the depopulation time of the image state becomes four times longer when it is resonantly populated from the surface state.

On- and off-resonance measurement of the Image State lifetime at the graphene/Ir(111) interface / S. Tognolini, S. Achilli, S. Ponzoni, L. Longetti, C. Mariani, M.I. Trioni, S. Pagliara. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 679(2019 Jan 01), pp. 11-16. [10.1016/j.susc.2018.08.010]

On- and off-resonance measurement of the Image State lifetime at the graphene/Ir(111) interface

S. Achilli;
2019

Abstract

The image potential state lifetime at the graphene/Ir(111) interface has been measured by tuning the pump photon energy on- and off-resonance for the optical transition between the surface state and the image state. By a joint effort of time resolved non-linear photoemission measurements and Optical Bloch Equations results, we astonishingly show that the depopulation time of the image state becomes four times longer when it is resonantly populated from the surface state.
Graphene; Image potential states; Non-linear photoemission
Settore FIS/03 - Fisica della Materia
1-gen-2019
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/721081
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