Purushottam ChakrabortyPurushottam Chakraborty is a former distinguished professor at the Saha Institute of Nuclear Physics, Kolkata, India. His research focusses on atomic collisions in solids, ion-beam modifications and analysis of materials, secondary ion mass spectromery (SIMS), low-dimensional structures and nanomaterials, molecular beam epitaxy, optoelectronics, nonlinear optics, photonics, and plasmonics. Read More Read Less