Physics – Condensed Matter
Scientific paper
2001-02-27
J. Phys.: Condensed Matter 16, 661 (2004)
Physics
Condensed Matter
27 pages, including 11 figures, version as published
Scientific paper
10.1088/0953-8984/16/4/015
A unified response theory for the time-resolved nonlinear light generation and two-photon photoemission (2PPE) from metal surfaces is presented. The theory allows to describe the dependence of the nonlinear optical response and the photoelectron yield, respectively, on the time dependence of the exciting light field. Quantum-mechanical interference effects affect the results significantly. Contributions to 2PPE due to the optical nonlinearity of the surface region are derived and shown to be relevant close to a plasmon resonance. The interplay between pulse shape, relaxation times of excited electrons, and band structure is analyzed directly in the time domain. While our theory works for arbitrary pulse shapes, we mainly focus on the case of two pulses of the same mean frequency. Difficulties in extracting relaxation rates from pump-probe experiments are discussed, for example due to the effect of detuning of intermediate states on the interference. The theory also allows to determine the range of validity of the optical Bloch equations and of semiclassical rate equations, respectively. Finally, we discuss how collective plasma excitations affect the nonlinear optical response and 2PPE.
Bennemann Karl-Heinz
Timm Carsten
No associations
LandOfFree
Response theory for time-resolved second-harmonic generation and two-photon photoemission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Response theory for time-resolved second-harmonic generation and two-photon photoemission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Response theory for time-resolved second-harmonic generation and two-photon photoemission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-563186