Biographical note

Sanjeev Kumar Raghuwanshi received his bachelor’s degree in electronic and instrumentation engineering from S.G.S.I.T.S. Indore, Madhya Pradesh, India, and his master’s degree in solid state technology from the Indian Institute of Technology, Kharagpur, in August 1999 and January 2002, respectively. Since July 2009, he has obtained a PhD degree in the field of optics from the Department of Electrical Communication Engineering of the Indian Institute of Science, Bangalore, India. He is an associate professor in the Electronics Engineering Department of the Indian Institute of Technology (ISM) in Dhanbad, India. He was a Post-Doctoral Research Fellow from 2014 to 2015 at the Instrumentation and Sensor Division, School of Engineering and Mathematical Sciences, City University London, Northampton Square, London. He has published more than 100 peer-reviewed and indexed International SCI Journal papers in the last 10 years. He has published four books on the contemporary optical fiber domain. In the last 5 years, 4 Indian patents have been filed and published. He has been sanctioned and executed several R&D projects from different central government funding agencies, including the Department of Atomic Energy, the Government of India (GOI), the Indian Space Research Organization (ISRO), the Council of Scientific and Industrial Research (CSIR), etc. He served as a reviewer for journals like IEEE Transactions on Measurement and Instrumentation, IEEE Sensor Journal, IEEE Photonics Technology Letter, and IEEE Quantum Electronics, to mention a few. He is an editorial board member and reviewer for several Indian journals. He received the Erasmus Mundus Scholarship for his postdoctoral study. He is a Fellow of the Optical Society of India (OSI), a Life Member of IETE, a Senior Member of IEEE (USA), and a Life Member of the International Academy of Physics Sciences.  
Santosh Kumar is a highly accomplished researcher and Professor with a Ph.D. degree from the Indian Institute of Technology (Indian School of Mines) in Dhanbad, India. Currently based at Liaocheng University, China, he specializes in optical fiber sensors, nano, and biophotonics, photonic and plasmonic devices, as well as waveguides and interferometers. Throughout his career, Dr. Kumar has successfully supervised twelve M.Tech. dissertations and mentored six Ph.D. candidates. He boasts a prolific publication record with over 300 research articles in prestigious national and international SCI journals and conferences. Driven by his commitment to advancing knowledge, he has presented his work at conferences held in China, India, Belgium, and the USA. Dr. Kumar is the author of two scholarly books, "2D Materials for Surface Plasmon Resonance-Based Sensors" (CRC Press, 2021) and "Optical Fiber-Based Plasmonic Biosensors: Trends, Techniques, and Applications" (CRC Press, 2022). His expertise is highly sought-after, reflected in his extensive reviewing contributions for over 1600 SCI journals published by renowned publishers such as IEEE, Elsevier, Springer, OPTICA, SPIE, Wiley, ACS, and Nature. Recognized for his achievements, Dr. Kumar is a Fellow of SPIE and a Senior Member of IEEE, SPIE, and OPTICA. He serves as an OPTICA Traveling Lecturer and holds the esteemed position of Chair of the Optica Optical Biosensors Technical Group. He has delivered numerous invited speeches and serves as a session chair for IEEE conferences. Additionally, Dr. Kumar has made significant editorial contributions, serving as an Associate Editor for journals such as IEEE Sensors Journal, IEEE Internet of Things, IEEE Access, IEEE Transactions on Nanobioscience, Frontiers of Physics, and Biomedical Optics Express. Dr. Santosh Kumar's contributions extend beyond academia. He is currently a Shandong Provincial Distinguished Foreign Expert by the Department of Science and Technology of Shandong Province, China. With his vast expertise and substantial contributions to the field, Dr. SantoshKumar continues to make remarkable strides in research, innovation, and scholarly leadership. 
Ritesh Kumar received his M.Tech. and Ph.D. degrees from IIT (ISM) Dhanbad, Dhanbad, India. He was a postdoctoral fellow at IIT Bhubaneshwar. He served as an assistant professor (TEQIP faculty) for three years at Madan Mohan Malaviya University of Technology, Gorakhpur. He is currently an assistant professor with the Department of electronics and Communication Engineering at Shri Phanishwar Nath Renu Engineering College, Araria, under the Department of science and Technology, Govt. of Bihar, India. He has published more than 20 research articles in international SCI journals, conferences, and book chapters. He has one patent grant and two published patents. He is a Life Fellow Member of ISTE. He is capable of effective teaching and conducting high-quality research in the fields of microwave photonics, electronics, and communications engineering, as well as waveguides and interferometers. He has achieved two best paper awards at the Springer conference.