On-chip wavefront shaping with dielectric metasurface
Abstract
Metasurfaces can be programmed for a spatial transformation of the wavefront, thus allowing parallel optical signal processing on-chip within an ultracompact dimension. On-chip metasurfaces have been implemented with two-dimensional periodic structures, however, their inherent scattering loss limits their large-scale implementation. The scattering can be minimized in single layer high-contrast transmitarray (HCTA) metasurface. Here we demonstrate a one-dimensional HCTA based lens defined on a standard silicon-on-insulator substrate, with its high transmission (<1 dB loss) maintained over a 200 nm bandwidth. Three layers of the HCTAs are cascaded for demonstrating meta-system functionalities of Fourier transformation and differentiation. The meta-system design holds potential for realizing on-chip transformation optics, mathematical operations and spectrometers, with applications in areas of imaging, sensing and quantum information processing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 07, 2019
- Source ID
- 10.1038/s41467-019-11578-y
Entities
People
- Anishkumar Soman
- Dun Mao
- Thomas Kananen
- Tiantian Li
- Tingyi Gu
- Zi Wang
Organizations
- Air Force Office of Scientific Research
- National Aeronautics and Space Administration