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Optical decoherence and quantum beats in Cs/Cu(111) RID A-3912-2009

Author:
Ogawa, S  Nagano, H  Petek, H  


Journal:
SURFACE SCIENCE


Issue Date:
1999


Abstract(summary):

Electron dynamics induced by optical excitation from the occupied Shockley surface state to an unoccupied state localized on Cs atoms on Cu(111) is studied by interferometric time-resolved two-photon photoemission. With near-resonant excitation, beat structures are observed in interferometric two-pulse correlation measurements, where the two-photon photoemission intensity is measured as a function of pump-probe delay time. The quantum beats that originate from the frequency differences among initial-intermediate and intermediate-final states, and the carrier frequency are reproduced qualitatively by a three-level optical Bloch equation model. (C) 1999 Elsevier Science B.V. All rights reserved.


Page:
34---38


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