Time-resolved measurements using femtosecond laser pulses
| Aim: To measure transient material properties (e.g.
charge carrier lifetime or phonon decoherence) on a sub-picosecond time-scale |
Approach: Detection of the response of a sample as a function of delay time
between two (pump-probe) or more (e.g. four-wave-mixing) incident laser pulses |
Impact: Picosecond time-resolution provides information that is usually
averaged out in other measurement techniques. |
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Frequency-doubled light of three infrared femtosecond laser pulses, generated in a DAST crystal.
Left panel: No temporal overlap. Right panel: All pulses arrive at the same time; each pair of beams
creates a visible spot between the individual ones (non-collinear second harmonic generation). |
People involved: Brunner, Schneider
