Femtosecond noncollinear parametric amplification for ultrafast spectral dynamics

We setup an ultrafast noncollinear optical parametric amplification system for fluorescence spectral dynamics study. The simultaneous broadband amplifying ability makes it suitable as an ultrafast spectrometer with femtosecond time-resolution. By real-time fluctuation correction, femtosecond fluorescence spectra are obtained efficiently by a single scan. With this technique, the solvation dynamics of DCM dye in four solvents are measured to demonstrate the performance of the system. We show that this ultrafast time-resolved spectrometer is very useful and efficient in studying ultrafast spectral dynamics.

Research highlights► Femtosecond fluorescent spectrometer based on non-collinear parametric amplification. ► Full fluorescence spectral decay at femtosecond time resolution is achieved by single temporal scan. ► Spectral dynamics can be observed and studied directly in this spectrometer system.