1. Department of Physics, Jahangirnagar University, Dhaka-1342, Bangladesh
2. Department of Physics, Comilla University, Kotbari, Comilla-3506, Bangladesh
3. PP and PDC, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka-1205, Bangladesh
4. IFRD, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka-1205, Bangladesh