title: Low-noise rotating sample holder for ultrafast transient spectroscopy at cryogenic temperatures.
abstract: 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.
authors.affiliation: FOM Institute for Atomic and Molecular Physics (AMOLF), Kruislaan 407, 1098 SJ Amsterdam, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Fanciulli
authors.forename: I
authors.initials: I
authors.lastname: Cerjak
authors.forename: J L
authors.initials: JL
authors.lastname: Herek
mesh_terms: D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005615:Freezing; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation* / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation* / Q000379:methods; D013997:Time Factors