Miniaturized GRIN Lenses Using 3D Printed Ceramics, BWAC Core Project
Jacob James Adams
Project runs from 10/01/2021 to 09/30/2022
In this project, we will develop models and a design flow to move from a canonical lens design to a transformed lens of convenient form with gradient permittivity, appropriate discretized unit cells to emulate the desired permittivity, and full wave models of the entire collection of unit cells. To transform the lens shape, conformal and quasi-conformal transformation optics (QCTO) techniques will be investigated. These methods map geometric deformations into material property variations to achieve the same effect in the deformed structure. Under appropriate conditions, TO and QCTO transformations can produce simple nearly isotropic material properties requiring only positive dielectric constants. This avoids the need to create resonant metamaterials that tend to be lossy and narrowband. However, the greater the deformation, the greater the range of material properties required; thus, high permittivity materials with spatially varying permittivity or gradient index (GRIN) will be required.