Welcome to OMN 2025, the 30th International Conference on Optical MEMS and Nanophotonics. Held in the vibrant city of Chiang Mai, Thailand, from July 13 to 17, 2025, this conference continues a longstanding tradition of showcasing groundbreaking research and innovations in optical microelectromechanical systems and nanophotonics. We are honored to host a diverse and distinguished group of scientists, engineers, and industry leaders from around the world.

OMN 2025 offers a rich program of plenary talks, invited presentations, oral and poster sessions, as well as a unique opportunity for post-conference networking amidst the cultural and natural beauty of northern Thailand. We hope this event fosters meaningful collaborations and inspiring discussions that will shape the future of our field.