Jong-ryul Choi is a Senior Researcher at the Medical Device Development Center of the Daegu-Gyeongbuk Medical Innovation Foundation (K-MEDI hub). He received his B.S. and Ph.D. degrees from the Department of Electrical and Electronic Engineering at Yonsei University in 2007 and 2013, respectively. Since 2013, he has joined the Medical Device Development Center of the K-MEDI hub in the Republic of Korea. His research interests include optical detection, imaging, stimulating platforms, and their biomedical applications. He has especially applied nanoplasmonic-enhanced optical techniques to medical instruments and applications.