Active Metasurface Systems for Angle-Sensitive and Low Intensity Imaging

The ability to dynamically control the optical response in the quasi-static and time-modulated regimes opens a multidimensional design space that can be fully harnessed by developing appropriate nanophotonic structures for arbitrary manipulation of light. Active metasurfaces have potential as building block components of meta-imaging systems, in which each cascadable element enables dynamic, independent, and comprehensive control over all constitutive properties of light in both reflection and transmission. Active metasurfaces can also form the components angle-selective lens-less imaging systems. I will discuss the properties and characteristics of angle-selective active metasurface imaging systems and compare their characteristics to conventional lens-coupled image sensors. I will also describe the use of active metasurfaces as elements of single-photon/pixel imaging systems for low intensity image acquisition using thermal and weak scattered light sources.