Sujaul Chowdhury (s.chowdhury-phy@sust.edu) is a Professor, Department of Physics, Shahjalal University of Science and Technology (SUST) www.sust.edu, Sylhet 3114, Bangladesh. He obtained B,Sc, Honours in Physics in 1994, M,Sc, in Physics in 1996 from SUST. He obtained PhD in Physics from the University of Glasgow, UK in 2001. He was a Humboldt Research Fellow for one year a t the Max Planck Institute, Stuttgart, Germany. He has authored two textbooks: a) Quantum Mechanics, b) Nanostructure Physics and Microelectronics published by Narosa, Delhi, India, co-published and distributed by Alpha Science International Limited, Oxford, UK. He has a glorious record of academic, scientific, teaching and research achievements; details are in http://schowdhury-phy.weebly.