Polarization-independent isotropic nonlocal metasurfaces with wavelength-controlled functionality

Abstract

Flat optics has demonstrated great advances in miniaturizing conventional, bulky optical elements due to the recent developments in metasurface design. Specific applications of such designs include spatial differentiation and the compression of free space. However, metasurfaces designed for such applications are often polarization-dependent and are designed for a single functionality. In this work, we introduce a polarization-independent metasurface structure by designing guided resonances with degenerate band curvatures in a photonic crystal slab. Our device can perform both free-space compression and spatial differentiation when operated at different frequencies at normal incidence. This work demonstrates the promise of dispersion engineering in metasurface design to create ultrathin devices with polarization-independent functionality.

9 pages, 8 figures

References in corpus (5)

• Inverse design of photonic crystals through automatic differentiation
• Photonic-crystal slabs with a triangular lattice of triangular holes investigated using a guided-mode expansion method
• Squeeze free space with nonlocal flat optics
• An optic to replace space and its application towards ultra-thin imaging systems
• Isotropic Topological Second-Order Spatial Differentiator Operating in Transmission Mode

Cited by in corpus (7)

• Roadmap on Nonlocality in Photonic Materials and Metamaterials
• Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing
• Space-squeezing optics in the microwave spectral region
• Broadband transparent Huygens' spaceplates
• Unitary control of partially coherent waves. II. Transmission or reflection
• Imaging with an ultra-thin reciprocal lens
• Joint control of coherent transmission, reflection, and absorption