At the beginning of May 2017, we installed a broadband pump-probe EOS spectrometer at the Institute of Organic Chemistry and Biochemistry to measure transient absorption on the nanosecond time scale. The system will be used to study the dynamics of photoinduced processes in predominantly organic materials.
The EOS spectrometer uses a pump-probe excitation method in which the probe beam monitors the changes in sample transmittance induced by the absorption of the excitation beam. The instrument has a built-in supercontinuum generator (350-2400 nm) that enables broad-spectrum probing. Its main advantages include electronic control of the delay between excitation and probing pulses, enclosure of all theadetector electronics in a separate box, and ease of operation.
System parameters
- Excitation: output of a tunable nanosecond OPO laser (spectral range 210-2600 nm, repetition rate 1 kHz, pulse width 3-6 ns)
- Probing: built-in supercontinuum generator (350-2400 nm, pulse width
- Detection: CMOS sensor (sensitivity range 350-900 nm, data acquisition rate up to 2400 spectra/s) Time window: 400 µs
