Broadband transparent Huygens' spaceplates
arXiv:2403.04425 · doi:10.1038/s44310-024-00025-6
Abstract
Spaceplates have emerged in the context of nonlocal metasurfaces, enabling the compression of optical systems by minimizing the required empty space between their components. In this work, we design and analyze spaceplates that support resonances with opposite symmetries, operating under the so-called Huygens' condition. Using the temporal coupled-mode theory, we demonstrate that the spatial compression provided by Huygens' spaceplates is twice that of conventional single-resonance counterparts. Additionally, they can support broader operational bandwidths and numerical apertures, facilitating the reduction of chromatic aberrations. Moreover, Huygens' spaceplates maintain nearly full transparency over a wide frequency and angular range, allowing their straightforward cascading for multi-frequency broadband operation. Finally, we propose a physical implementation of a Huygens' spaceplate for optical frequencies based on a photonic crystal slab geometry.
9 pages, 5 figures
References in corpus (6)
- High-efficiency light-wave control with all-dielectric optical Huygens' metasurfaces
- Why optics needs thickness
- Polarization-independent isotropic nonlocal metasurfaces with wavelength-controlled functionality
- Designing high-performance propagation-compressing spaceplates using thin-film multilayer stacks
- Space-squeezing optics in the microwave spectral region
- Generalized Huygens' condition as the fulcrum of planar nonlocal omnidirectional transparency: from meta-atoms to metasurfaces