Prof. Joonku Hahn(한준구) received bechelor and master degrees from Department of Physics, Seoul National University in 1997 and 1999, respectively. Then, he worked for Optoelectronic Materials Group in LS Cable from 1999 to 2004. In 2009, he received his Ph. D. from Department of Electrical Engineering, Seoul National University. He worked as a postdoctoral research associate at Duke University for two years. From 2011 to now, Prof. Hahn has been working at School of Electronics Engineering, Kyungpook National University.

한준구 Joonku Hahn