Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 77, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2167128
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We describe an ultrafast spectroscopy system based on two synchronized noncollinear optical parametric amplifiers (NOPAs). Each NOPA can be independently configured to generate ultrabroadband sub-10 fs visible pulses, tunable 15 fs visible pulses (500-720 nm), tunable 15-30 fs near-infrared pulses (900-1500 nm), and 15-20 fs blue pulses (430-480 nm). This system enables to perform pump-probe experiments over nearly two octaves of spectrum with unprecedented temporal resolution. We present application examples highlighting the capability of this instrument to track excited-state dynamics occurring on the sub-100 fs time scale: electron transfer in polymer-fullerene blends, intersubband energy relaxation in carbon nanotubes, and internal conversion in carotenoids. (c) 2006 American Institute of Physics.
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