Microstructural Analysis Unit
University of Technology, Sydney
Sumin is a PhD student studying zinc oxide (ZnO) which is a semiconductor material and might be a good candidate for short wavelength optoelectronic devices such as laser diodes. He has recently completed his Bachelor degree with First Class Honours and University Medal in 2012.
His research mainly involves cathodoluminescence spectroscopy which is a key technique to examine the electronic band structures of semiconductor materials since the optical properties of a semiconductor primarily reflect the electronic structure. He has applied this technique to analyse whispering gallery modes and defect distributions of ZnO by cahodoluminescence mapping. He is primarily being supervised by Dr. Cuong Ton-That, Prof. Matthew Phillips and Dr. Igor Aharonovich.
Optical and lasing properties of ZnO nano- and microstructures.
Effects of non-stoichiometry on the structural and optical properties of ZnO
Dr. Cuong Ton-That
Prof. Matthew Phillips
Dr. Igor Aharonovich
Recent Interests and Techniques
Spatial distribution of defects in ZnO microdisks
Whispering Gallery Modes of ZnO microdisks
Cathodoluminescence and Photoluminescence spectroscopy
Recent Awards and Scholarships
International Research Scholarship (IRS)
University Medal (2012)
Dean’s Merit List for academic excellence award (UTS – 2009, 2010, 2012)
Stanton Coalstad Prize (UTS – 2009, The highest mark in ‘Introduction in Materials’ subject)