Niranjan Shivaramمشاهده پروفایل
استادیار
Niranjan Shivaram is an Assistant Professor of Physics and Astronomy at Purdue University. He holds a PhD in Physics from the University of Arizona (2013), an MS in Physics from Jawaharlal Nehru University (2007), and a BS in Physics, Chemistry, and Mathematics from St. Joseph's College, Bangalore University (2005). His research focuses on ultrafast electron dynamics using coherent extreme-ultraviolet/soft-x-ray light from high harmonic generation (HHG), with applications in studying molecular systems at femtosecond-to-attosecond timescales. Key areas include conical intersection dynamics, X-ray free-electron lasers (XFEL), and nonlinear optical spectroscopy techniques like optical Kerr-effect spectroscopy. His experimental work combines HHG sources with optical parametric amplifiers to achieve time-resolved measurements. Notable projects involve probing ultrafast dynamics in molecules such as nitrobenzene, CO₂ dimers, and hexagonal boron nitride. He has utilized facilities like the Linac Coherent Light Source (LCLS) for XFEL-based studies and developed novel setups for electric field-resolved spectroscopy. His group also explores attosecond entangled photon generation from metastable helium and advanced signal analysis methods like lock-in amplification and polarization projected density matrices. Research themes span molecular frame analysis, intermolecular Coulombic decay, and nonadiabatic dynamics. Shivaram's contributions include advancing ultrafast transient polarization spectroscopy, velocity-map imaging, and focal overlap gating techniques to enhance signal-to-noise ratios in photoelectron experiments. His work bridges theoretical modeling with cutting-edge experimental setups to uncover fundamental mechanisms in atomic, molecular, and condensed matter systems.









