Date of Degree
David T. Crouse
Metamaterials; Metasurfaces; Photon Sorting
Metamaterials are a recent discovery gaining much interest due to their promising applications to multiple devices in sensing, imaging, photovoltaics, nonlinear optics, heat conversion, sorters, and multitudes of other devices. These metamaterials are made of subunits called meta-atoms which take a role similar to that of atoms in bulk crystals. However, unlike their atom counterparts, these meta-atoms are macroscopic and can be engineered to respond to a driving field in a desired way. Metasurfaces, the 2-dimensional analog of metamaterials, have been shown to possess the ability to control light in novel ways. In this work, we investigate a particular type of metasurface namely a cavity array metasurface which consists of a metal film with an array of apertures which form the meta-atoms.
We will discuss methods for using such metasurfaces to develop innovative forms of photon sorting and frequency selective absorption. The metasurface devices presented illustrate how, by designing the cavity meta-atoms, various desired global properties can be achieved. Among the devices we will demonstrate are a novel polarization sensing pixel implementing a 1-dimensional polarization sorting metasurface, a Stokes parameter sensor device implementing a novel 2-dimensional cavity array metasurface, a 2-dimensional perfect absorbing metasurface with subwavelength photon sorting in the microwave, a 2-dimensional transmitting metasurface with subwavelength photon sorting in the near-IR, and an actively tunable frequency selective perfect absorber using two 2-dimensional metasurface.
Mandel, Isroel Moshe, "Metasurfaces for photon sorting and selective absorption" (2015). CUNY Academic Works.