Abstract
Two-photon ionisation processes of rare-gas atoms produced by a superposition of multiple high order harmonics are studied by using a photoelectron spectroscopy technique. Second-order nonlinearity is confirmed by comparing the intensity-dependent photoelectron yields between the linear and nonlinear processes, and the cross sections of these processes are estimated. We also demonstrate the autocorrelation measurement of harmonic envelopes as a preliminary step toward characterisation of an attosecond pulse train.
| Original language | English |
|---|---|
| Pages (from-to) | 203-211 |
| Number of pages | 9 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 83 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2006 May |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)