S. Rajesh received the Ph.D. degree in physics from Bharathiar University, Coimbatore, India, in 2002, with a focus on thin-film solar cells. He has teaching and research experience for the past 15 years and guided six Ph.D. and five M.Phil. scholars. He is currently a Full Professor of physics and the Head of the Department of Nanoscience and Technology, Karunya Institute of Technology and Science, Coimbatore, where he is also the Program Coordinator of the Department of Science and Technology Nano Mission Program of Government of India. His current research interests include the preparation and characterization of thin films for solar cell applications, thermally evaporated multijunction cascade structure for quantum confinement, and the surface modification of CNT for gas-sensing applications.