1. Division of Industrial Materials Science, Faculty of Science and Technology, Rajamangala University of Technology Phra Nakhon, 1381 Pracharat 1 Road, Bang Sue, Bangkok 10800, Thailand
2. Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180, United States
3. Department of Physics and Astronomy, Howard University, 2355 6th Street, NW, Washington, DC 20059, United States