Dr. J. Thirumalai received his Ph.D. from Alagappa University, Karaikudi in 2010. He was also awarded the Post-doctoral Fellowship from Pohang University of Science and Technology (POSTECH), Republic of Korea, in 2013. He worked as Assistant Professor of Physics, B.S. Abdur Rahman University, Chennai, India (2011 to 2016). Currently, he is working as Senior Assistant Professor of Physics, Srinivasa Ramanujan Centre, SASTRA Deemed University, Kumbakonam (T.N.), India. His research interests focus on luminescence, self-assembled nanomaterials, and thin film opto-electronic devices. He has published more than 60 SCOPUS/ISI indexed papers and 11 book chapters, edited 4 books and member in several national and international societies like RSC, OSA, etc. Currently, he served as a principal investigator for a funded project towards the application of luminescence based thin film opto-electronic devices, funded by the Science and Engineering Research Board (SERB), India. As an expert in opto-electronics and nanotechnology area, he has been invited as external and internal examiners to MSc and PhD theses, invited to give talk in some forum, review papers for international and national journals.