We present the design and testing of a rotating device that fits within a commercial helium cryostat and is capable of providing at 4 K a fresh sample surface for subsequent shots of a 1–10 kHz amplified pulsed laser. We benchmark this rotator in a transient-absorption experiment on molecular switches. After showing that the device introduces only a small amount of additional noise, we demonstrate how the effect of signal degradation due to high fluence is completely resolved.

Rev. Sci. Instrum.

Fanciulli, R., Cerjak, I., & Herek, J. (2007). Low-noise rotating sample holder for ultrafast transient spectroscopy at cryogenic temperatures. Rev. Sci. Instrum., 78(Article number: 53102), 1–5. doi:10.1063/1.2735557