Sang-Wook Han received the B.S., M.S., and Ph.D. degrees in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea, in 1999, 2001, and 2006, respectively. From 2006 to 2009, he worked for the Pixelplus Corporation, Gyeonggi, South Korea, where he is working on the development of various CMOS imagers. From 2009 to 2012, he was a Research Staff with the Samsung Advanced Institute of Technology, Gyeonggi, where he engaged in researching high sensitivity CMOS imagers and photon counting X-ray detector. In 2012, he joined the Korea Institute of Science and Technology, Seoul, South Korea. His research interests include quantum information, especially quantum key distribution systems, random number generator, quantum signature, single photon detector, and quantum computer system based on NV center in diamond.