**Meet the editor**

Narottam Das received his BSc and MSc degrees in electrical and electronic engineering from the Chittagong University of Engineering and Technology, Chittagong, and Bangladesh University of Engineering and Technology, Dhaka, Bangladesh, respectively. He received his PhD degree in systems and information engineering from Yamagata University, Japan, in 2000. Currently, he is a lecturer in Electrical Engineering, School of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoom-

ba, Queensland, Australia, and an adjunct Senior Research Fellow in the Department of Electrical and Computer Engineering, Curtin University, Perth, Australia. During 2014, he was an associate professor in the Department of Electrical and Computer Engineering, Curtin University Sarawak, Malaysia. Earlier, he worked at Curtin University, Edith Cowan University, Perth and Monash University, Melbourne, Australia; NEC Yamagata Ltd., Yamagata, Japan; and Bangladesh Export Import Company, Dhaka, Bangladesh. He is the author/co-author of eight book chapters, more than 135 peer-reviewed journal and international conference papers and more than 20 technical reports at NEC Yamagata Ltd., Japan. He is the editor of the books *Optical Communication Systems*, *Optical Communication* and *Advances in Optical Communication*. Currently, he is a guest editor of the Journal of MDPI, Energies Special Issue "Nano-structured Solar Cells". His research interests include pulse propagation, wave mixing, high-speed communication devices (semiconductor optical amplifiers), plasmonics and plasmonics-based communication devices (metal-semiconductor-metal photodetectors) and high efficiency solar cells (i.e. renewable energy). Dr Das is a senior member of the IEEE Power and Energy Society, Photonics Society, USA; member of the Institute of Engineers, Australia; and a Life Fellow of the Institute of Engineers, Bangladesh.
