Inverse-Designed Meta-Optics with Spectral-Spatial Engineered Response to Mimic Color Perception

摘要

Meta-optics have rapidly become a major research field within the opticsand photonics community, strongly driven by the seemingly limitless opportunitiesmade possible by controlling optical wavefronts through interactionwith arrays of sub-wavelength scatterers. As more and more modalities areexplored, the design strategies to achieve desired functionalities becomeincreasingly demanding, necessitating more advanced design techniques.Herein, the inverse design approach is utilized to create a set of single-layermeta-optics that simultaneously focus light and shape the spectra of focusedlight without using any filters. Thus, both spatial and spectral propertiesof the meta-optics are optimized, resulting in spectra that mimic the colormatching functions of the CIE 1931 XYZ color space, which links the spectraldistribution of a light source to the color perception of a human eye. Experimentaldemonstrations of these meta-optics show qualitative agreement withthe theoretical predictions and help elucidate the focusing mechanism ofthese devices.