The purpose of this talk is to give an overview of the state of the art wavefront sensor detectors developments held in Europe for the last decade. These detectors are also excellent candidates for interferometric instruments that use fast detectors having similar requirements. The success of the next generation of instruments for 8 to 40-m class telescopes will depend on the ability of Adaptive Optics (AO) systems to provide excellent image quality and stability. This will be achieved by increasing the sampling, wavelength range and correction quality of the wave front error in both spatial and time domains.