EunMi Choi received the B.S, M.S., and Ph.D degrees in physics from Ewha Womans University (Seoul, South Korea) in 2000, Pohang University of Science and Technology (Pohang, South Korea) in 2002, and Massachusetts Institute of Technology (Cambridge, MA, USA) in 2007, respectively. Currently, she is an associate professor with Department of Electrical Engineering at Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea. She joined UNIST in 2010 as a professor and has led the THz Vacuum Electronics and Applied Electromagnetics (TEE) Laboratory as a principle investigator since then. Her main contribution in the field includes high power vacuum electronics development (gyrotrons, TWTs, etc) and its application for remote detection of radioactive materials experimentally, and energy recirculating microfabricated vacuum electronics amplifier source development. Her current research interests span from development of electron beam based high power millimeter and THz sources, ultra compact THz sources at 300 GHz and beyond by means of micro-fabrication techniques, orbital angular momentum (OAM) beams generation for communication system and exotic electromagnetic waves generation, to their possible applications in novel technique in remote detection of radioactive materials, next generation communications beyond 5G, and plasma interaction with exotic electromagnetic waves.