| Autor: |
Pezeril T, Klieber C, Shalagatskyi V, Vaudel G, Temnov V, Schmidt OG, Makarov D |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2014 Feb 24; Vol. 22 (4), pp. 4590-8. |
| DOI: |
10.1364/OE.22.004590 |
| Abstrakt: |
We have developed a high-sensitivity, low-noise femtosecond imaging technique based on pump-probe time-resolved measurements with a standard CCD camera. The approach used in the experiment is based on lock-in acquisitions of images generated by a femtosecond laser probe synchronized to modulation of a femtosecond laser pump at the same rate. This technique allows time-resolved imaging of laser-excited phenomena with femtosecond time resolution. We illustrate the technique by time-resolved imaging of the nonlinear reshaping of a laser-excited picosecond acoustic pulse after propagation through a thin gold layer. Image analysis reveals the direct 2D visualization of the nonlinear acoustic propagation of the picosecond acoustic pulse. Many ultrafast pump-probe investigations can profit from this technique because of the wealth of information it provides over a typical single diode and lock-in amplifier setup, for example it can be used to image ultrasonic echoes in biological samples. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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