9. Nanosecond Transient Absorption Spectrometer

Technique 

The setup uses a high intensity laser pulse to produce a long-lived excited state in the sample. The perturbation in the sample causes a change in the absorption intensity over a short period of time. These changes are probed with a pulsed xenon source lamp.

​

Units

Q-switched Nd-YAG laser system with optical parametric oscillator, two detectors.

​

Instrument type

Homemade

​

Complexity level

High

​

Applications

As a pump-probe technique, it is used to record kinetic and spectral information about long-lived excited states. Temporal resolution is limited to 10 ns while the excitation and detection spectral range extends from 250 to 900 nm.