Flat optics

Dielectric metasurfaces are planar devices that promise to replace optical components like lenses, mirrors, polarizers, waveplates. We are working with deielctric metasurfaces in the form of high contranst transmitarrays and high contrst gratings. We are using these structures for applications like ultra-compact optical microscopy. The image below shows a scanning electron microscope image of a polarization and phase plate with sub-wavelength spatial resolution.