Dr Sandeep Kumar joined as Assistant Professor in the Department of Physics, DAV University, Jalandhar in August 2013. He completed his Ph.D (Physics) on the topic “Study of photo diffusion in Germanium Antimony Telluride thin films” from Guru Nanak Dev University, Department of Physics, Amritsar, India. During his Ph.D, he worked on phase-change materials for the potential application in non-volatile optical and electrical memories. His Ph.D thesis work was to investigate the effect of photodiffused Ag in GeSbTe phase-change chalcogenide thin films in terms of electrical and optical properties. He has published work in reputed applied physics journals and has a total of 39 publications in journals of international repute. Currently, he is working on heterogeneous catalysis of dye photodegradation for water remediation with a suitable catalyst. His research interests centre on amorphous semiconductors, phase-change materials, photo-diffusion, nanomaterials, heterogeneous photocatalysis. He has qualified CSIR (JRF)-NET and GATE exams. He is a life member of Thermo-physical Society of India (TPSI).