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Two-color pump-probe system broadly tunable over the visible and the near infrared with sub-30 fs temporal resolution

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3 Author(s)
Manzoni, C. ; National Laboratory for Ultrafast and Ultraintense Optical Science—CNR-INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy ; Polli, D. ; Cerullo, G.

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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.

Published in:

Review of Scientific Instruments  (Volume:77 ,  Issue: 2 )

Date of Publication:

Feb 2006

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