The 2nd International Workshop on Photonics Applied to Electromagnetic Measurements (PEM2017), hosted by the IT'IS Foundation, was held in Zurich, Switzerland on October 5 – 6, 2017. PEM2017. The PEM workshops, initiated by the PEM Technical Committee of the Japanese Institute of Electronic, Information and Communication Engineers (IEICE), are devoted to the research, development, and application of photonics in electromagnetic measurements and closely related fields, such as fiber-optic signal transmission, photonic signal processing, display integrated antennas, and photonic device technology.