High-index contrast grating reflectors for wavefront engineering

High-index contrast grating mirrors providing wave front control of the transmitted light as well as high reflectivity over a broad band- width are suggested and both numerically and experimentally investigated. General design rules to engineer these structures for different applications are derived. Such grating mirrors would have a significant impact on low cost laser fabrication, since a more efficient integration of optoelectronic modules can be achieved by avoiding expensive external lens systems