Distinguished Professor Yahya Rahmat-Samii delivered a keynote speech entitled: “The Marvels of Periodic Structures in Modern Electormagetnics and Antennas: Anew Look at FSS, EBG, Reflectarrays, OAM and Nano-Pillars” at the 2018 International Workshop on Electromechanical Coupling (IWEC) held in Xi’an, China, May 27-30, 2018. In 2014, Prof. Rahmat-Samii was appointed as the Master of the 111 Project related to the topics of this workshop.