Current research:


Photochemical processes mediated by vibrational excitation in tropospheric chemistry

(2013 - 2016)

Knowledge of photochemical processes is essential to understand atmospheric chemistry at all. In tropospheric chemistry vibrational excitation of chromophores of present molecules has been shown as a key step leads to photochemical processes which utilize VIS and NIR spectral region of the Sun radiation. The processes are important in all cases when processes initiated by the UV radiation are not effective.
We try to investigate these kind of processes in quantitative terms and to determine the role of the processes in the Earth atmosphere. To achieve this, we use unique experimental equipments of our laboratory contain tunable high resolution lasers in NIR region, pulsed laser in IR, VIS, and UV spectral region, further techniques for creating molecular and cluster beams for generating ultra cold molecules and molecular clusters.
All of these approaches allow us to study spectroscopy and photochemistry in model systems relevant to complex atmospheric systems, both in gas phase and in molecular clusters by direct absorption spectroscopy and also IR-UV double resonance action spectroscopy for the study of chemical dynamics.


New cw-CRDS experiment

Schematic experimental set-up:

The first example of ring-down fit: