1. National Institute of PhysicsUniversity of the Philippines Diliman Diliman Quezon City 1101 Philippines
2. Materials Science and Engineering ProgramCollege of ScienceUniversity of the Philippines Diliman Diliman Quezon City 1101 Philippines
3. Institute of Laser EngineeringOsaka University 2-6 Yamadaoka, Suita Osaka 565-0871 Japan