Conformal Volumetric Grayscale Metamaterials
Abstract
Conformal artificial electromagnetic media that feature tailorable responses as a function of incidence wavelength and angle represent universal components for optical engineering. Conformal grayscale metamaterials are introduced as a new class of volumetric electromagnetic media capable of supporting highly multiplexed responses and arbitrary, curvilinear form factors. Subwavelength‐scale voxels based on irregular shapes are designed to accommodate a continuum of dielectric values, enabling the freeform design process to reliably converge to exceptionally high figures of merit (FOMs) for a given multi‐objective design problem. Through additive manufacturing of ceramic–polymer composites, microwave metamaterials, designed for the radio‐frequency range of 8–12 GHz, are experimentally fabricated and devices with extreme dispersion profiles, an airfoil‐shaped beam‐steering device, and a broadband, broad‐angle conformal carpet cloak, are demonstrated. It is anticipated that conformal volumetric metamaterials will lead to new classes of compact and multifunctional imaging, sensing, and communications systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 31, 2023
- Source ID
- 10.1002/adma.202204688
Entities
People
- Jonathan A. Fan
- Lucia T Gan
- Qinglan Huang
Organizations
- Air Force Office of Scientific Research
- National Aeronautics and Space Administration
- Office of Naval Research
- Stanford University