Gandham Lakshminarayana, research fellow, is graduated from Sri Venkateswara University, India with a Ph.D. degree in Physics. After his Ph.D., he worked as a postdoctoral researcher, research fellow, and research professor in different countries. He also has 3 years of experience teaching undergraduate and graduate students by now apart from research experience (by Dec. 2024, 14 years and 8 months after Ph.D.). His main research interests are Rare-earth/Transition metal ion doped or undoped optical materials (glass, glass-ceramic, phosphor, and transparent ceramic), nuclear radiation attenuating materials, fuel cells, thin films, and nanomaterials for their specific applications.