| Attosecond
pulse measurements |
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| Generating: |
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| Harmonic
generation in the cut-off region |
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| § | Polarization
gating: |
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| Ø | Linear
part contributes most to HHG |
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| Ø | Control
the duration of the linear part |
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| Left + right (delayed) |
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| circularly
polarized pulses |
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| Measuring: |
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| Autocorrelation
method fails |
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| Ø | Weak intensity |
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| Ø | No nonlinear
medium working in this |
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| wavelength |
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| § | Cross-correlate
XUV with IR pulse |
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| Ø | Laser-modified
photoionization spectra |
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| Ø | The
atomic gas serves as the nonlinear |
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| medium. |
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| 7 |