Helios' unique continuum generation unit allows for probing the transients in several spectral regions. Below please see an example of the data acquired with Helios equipped with NIR extension.
The sample in the experiment is spheroidene, open chain carotenoid pigment with 10 conjugated carbon-carbon double bonds. This molecule appears in light harvesting complexes (LH) and reaction centers (RC) of photosynthetic bacteria Rhodobacter Sphareoides and its photophysics is well known. In this experiment data are taken at 77 K with excitation wavelength at 500 nm.
The data example is courtesy of Prof. Harry A. Frank, Department of Chemistry, University of Connecticut.
Laser system coupled to Helios: Spitfire® Pro, OPA-800 C (Spectra-Physics*)