Helios is a CCD-based pump-probe transient absorption spectrometer, used for monitoring extremely short-lived optically absorbing states. The experimental time window ranges from femtoseconds to nanoseconds. The system is completely turn-key, including an optical unit and a PC, containing the data acquisition hardware and software. The system is designed to work with an amplified Ti: Sapphire femtosecond laser, such as the Spectra-Physics Spitfire Pro, to produce the spectral and kinetic data required for investigating photoexcitation events on the sub-picosecond and longer timescale. The system produces a 3-D Wavelength-Time-Absorbance data matrix in a form of an ASCII CSV file, which can be easily processed and displayed with our Surface Xplorer software.
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