Gwenn Ulliac received the M.Sc. and Ph.D degrees in microwave and microtechnology from Lille University, France, in 2001 and 2005 respectively. In 2006, he joined the FEMTO-ST Institute, where he is currently a research engineer in the MIMENTO clean room in charge of technological developments on lithium niobate material. His research interests include the fabrication and the technological developments of opto-electronic and acousto-optical devices (waveguides, bragg gratings, photonic crystals, phononic crystals, acoustic resonator…). Since 01/10/2017, he joined the University of Tokyo for a one-year assignment at VDEC / MITA Lab as part of an international exchange program between French and Japanese networks of micro-nano-fabrication clean-rooms.