Affiliation: | 1.National Institute of Physics, College of Science,University of the Philippines, Diliman,Quezon City,Philippines;2.Department of Physics, School of Science and Engineering,Ateneo de Manila University, Loyola Heights,Quezon City,Philippines;3.Research Center for Development of Far-Infrared Region,University of Fukui,Fukui,Japan;4.Graduate School of Education,University of Fukui,Fukui,Japan |