  Meta-optics have rapidly become a major research field within the optics and
photonics community, strongly driven by the seemingly limitless opportunities
made possible by controlling optical wavefronts through interaction with arrays
of sub-wavelength scatterers. As more and more modalities are explored, the
design strategies to achieve desired functionalities become increasingly
demanding, necessitating more advanced design techniques. Herein, the
inverse-design approach is utilized to create a set of single-layer meta-optics
that simultaneously focus light and shape the spectra of focused light without
using any filters. Thus, both spatial and spectral properties of the
meta-optics are optimized, resulting in spectra that mimic the color matching
functions of the CIE 1931 XYZ color space, which links the distributions of
wavelengths in light and the color perception of a human eye. Experimental
demonstrations of these meta-optics show qualitative agreement with the
theoretical predictions and help elucidate the focusing mechanism of these
devices.
