Nanophotonics, Nanoelectronics and Nanosensor (N3) is part of International Photonics and OptoElectronics Meetings (POEM), launched by Wuhan National Laboratory for Optoelectronics (WNLO). POEM is a large-scale multi-disciplinary international conference in the field of photonics and optoelectronics. It aims to focus on the key techniques of scientific frontier and industry in the field of optoelectronics, grip trend in the future as well as give full play to the industrial advantage of Wuhan - Optics Valley of China. Extensive research on nanotechnology has unveiled many interesting and promising applications in photonics, electronics and sensors. The aim of this N3 conference will provide a forum for information exchange among international academics, researchers, and students who are working in the areas of nanophotonics, nanoelectronics and nanosensors. This conference will provide a platform for discussing and promoting new developments, concepts and practices, and identifying future research needs so that nanotechnology can be brought closer to its immense potential and industrial applications.