MAGNETO-MECHANICALLY RECONFIGURABLE METASURFACE
Abstract
Metasurfaces have been used to demonstrate optical elements and systems with capabilities that surpass those of conventional diffractive optics. Optical metasurfaces are two-dimensional (2D) arrays of subwavelength sized scatterers that are designed to modify different characteristics of light such as its wavefront, polarization distribution, intensity, or spectrum. In the past few years, the efficiency of optical metasurfaces has improved significantly by switching from metallic subwavelength scatterers to dielectric scatterers with high refractive index. Even so, this current model has the disadvantage of holding all metasurfaces properties generally fixed because the morphology of metasurfaces is stationary. Here, we propose a magneto-mechanically reconfigurable metasurfaces that can manipulate light by the inclusion of high-index dielectric materials into magnetic composites. Patterned magnetic components under externally applied magnetic field generate a magnetic moment, which results in the morphological change of the metasurface (i.e., 2D arrays of subwavelength scatterers). The magneto-mechanical actuations can be encoded with a pre-programmed alignment of magnetic particles embedded into the individual scatterers and its 2D array of design. We envision the magnetically shape-reconfigurable metasurfaces as a complementary platform in optical element and system design for various applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA23862214086
Entities
People
- Jeongjae Wie
Organizations
- Air Force Office of Scientific Research
- United States Air Force