My research interest centers on setting up modern femtosecond spectroscopic techniques and use them to investigate ultrafast structural dynamics and interactions in bio(molecular) systems. We have explored heterogeneity, picosecond dynamics and viscosity-decoupling in deep eutectic solvents (a new class of designer solvents) and other complex media using ultrafast fluorescence spectroscopy. In recent years, I designed and built ultrafast 2-dimensional infrared (2DIR) spectrometer (an optical analog to 2D NMR having femtosecond resolution), terahertz time-domain (THz-TDS) spectrometer and Sum Frequency Generation (SFG) spectrometer to study structure and dynamics of DNA, lipid and ionic liquids. We have investigated the role of electric field interaction at bio-interface by studying the fluctuating electric field at the surface of native DNA using ultrafast 2DIR spectroscopy. We have also studied the sensitivity of biomolecular vibrations to electric filed exerted by hydration environment and role of Coulomb coupling and anharmonic coupling.

PhD positions available: Highly motivated students who are interested in pursuing PhD on 'ultrafast laser spectroscopy and chemical dynamics' are encouraged to apply online (as soon as possible) through the university link https://applications.snu.edu.in/OnlineAppPG/public/application/register/index

Candidates must have an excellent MSc in Chemistry (physical, organic, or inorganic) or Physics. NET/GATE qualification is a plus but not mandatory. Students will receive a great stipend per month and hostel accommodation will be provided.