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Jitter-limited time resolution. Laser (800 nm) induced coherent A 1g phonon mode in a 40 nm thin (111)-oriented film of crystalline bismuth at an incident fluence of 1 mJ cm−2. The fit by the model function in the plot legend reveals a time resolution of 110 fs σ (r.m.s.). Timing-drifts of the pump laser timing were corrected for by the laser arrival monitor (LAM).
