1. Centre for Optical and Laser Engineering (COLE), School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 639798, Singapore
2. Singapore Centre for 3D Printing (SC3DP), School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), 639798 Singapore
3. Natural Science and Science Education, National Institute of Education, Nanyang Technological University (NTU), 637616 Singapore
4. Physics and Applied Physics, School of Physical and Mathematical Science, Nanyang Technological University (NTU), 639798 Singapore