The project concerns the study of new materials, components and photonic systems in which colour centers or crystalline diamond defects will be used, with specific magnetic and optical properties. It will enable socially important applications, such as the development of super-sensitive detection of cancer cells and nano-marking of biological substances. The synergy of four scientific teams will allow the development of technological platforms with planar glass matrices and structured fibre optics with adequately oriented quantum defects in the diamond. This will allow the use of nonlinear photonics and nano-magnetic interactions to study biological activity. This innovative combination of nano-photo-magnetic-biological methods will enable better understanding and development of the possibilities of spectroscopy, imaging and ultrafast techniques using light.