Ratno Nuryadi was born in Yogyakarta, Indonesia, in 1973. He received the B.S., M.Eng., and Ph.D. degrees from Shizuoka University, Hamamatsu, Japan, in 1998, 2000, and 2003, respectively. From 2003 to 2006, he worked as a Postdoctoral Researcher with the Research Institute of Electronics, Shizuoka University, in the research field of Si quantum tunneling devices and their application to photonic devices, where he became an Assistant Professor with the Research Institute of Electronics from 2003 to 2006. In 2008, he became a Researcher with the Center for Materials technology, Agency for Assessment and Application of Technology (BPPT), Indonesia. In 2015, he was a Visiting Professor with the Research Institute of Electronics, Shizuoka University, during three months. Since 2016, he has been a Research Professor with the Research Institute of Electronics. He is currently a Research Professor with the Research Center for Photonics, Research Organization for Nanotechnology and Materials, National Research and Innovation Agency (BRIN), Indonesia, where he is also the Head of the Research Organization for Nanotechnology and Materials. His research interests include micro- or nanostructured physics, chemical-biosensors, and instrumentation.