Dielectric Metalens and Its Application in Near-Infrared Single Photon Detection

Metasurfaces, the two dimensional form of metamaterials, have the outstanding properties in the manipulation of electromagnetic waves, the integration with the existing devices and one-step fabrication. In this talk, we will present theoretically and experimentally the conceptually new metasurface to control light propagation, confinement and enhancement with anomalous functionalities. The interaction of light with traditional semiconductor materials and the related photon-electron energy transition are also taken into consideration. The experiment result matches our expectations. Finally, we will talk about the work we have done in metasurface integration with infrared single photon detectors.