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Updated: Jan 8, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
A UHV-compatible, time-resolved spontaneous Raman spectrometer for multi-messenger ultrafast studies: Design and
A M Finardi, C Fasolato, A Giugni
1CNR-Istituto Officina dei Materiali (IOM), 34149 Basovizza, Trieste, Italy.
Abstract:
Time-resolved (TR) Raman spectroscopy is a unique tool for studying the dynamic properties of quantum matter and can become a key element of the multi-messenger research in the time domain. We present here the features and results of a novel setup for TR Raman, designed to expand the NFFA-SPRINT facility by integrating it with TR optical, transient grating and electron spectroscopy and spin polarization techniques. The TR Raman setup is characterized by a wide energy tunability of the pump and probe pulses, owing to the presence of a laser system providing ultrashort (50 fs to 2 ps) light pulses from the near ultraviolet to the infrared spectral regions. The ultra-high vacuum sample environment allows for the measurement of air-sensitive samples and ensures the full compatibility with photoelectron spectroscopies, as well as a wide sample temperature range. The functionalities of the setup and the multi-messenger research approach are here demonstrated by presenting studies of the relaxation dynamics in photoexcited semiconductor systems, namely, Si and MoS2. In addition, the pump-probe response of magnetite across the Verwey transition is presented, highlighting the capability of TR spontaneous Raman spectroscopy to be a valuable tool for probing photoinduced phase transitions in the time domain.
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