RT Journal Article SR Electronic T1 Snapshot spectral imaging with parallel metasystems JF Science Advances JO Sci Adv FD American Association for the Advancement of Science SP eabc7646 DO 10.1126/sciadv.abc7646 VO 6 IS 38 A1 McClung, Andrew A1 Samudrala, Sarath A1 Torfeh, Mahsa A1 Mansouree, Mahdad A1 Arbabi, Amir YR 2020 UL http://advances.sciencemag.org/content/6/38/eabc7646.abstract AB Spectral imagers divide scenes into quantitative and narrowband spectral channels. They have become important metrological tools in many areas of science, especially remote sensing. Here, we propose and experimentally demonstrate a snapshot spectral imager using a parallel optical processing paradigm based on arrays of metasystems. Our multi-aperture spectral imager weighs less than 20 mg and simultaneously acquires 20 image channels across the 795- to 980-nm spectral region. Each channel is formed by a metasurface-tuned filter and a metalens doublet. The doublets incorporate absorptive field stops, reducing cross-talk between image channels. We demonstrate our instrument’s capabilities with both still images and video. Narrowband filtering, necessary for the device’s operation, also mitigates chromatic aberration, a common problem in metasurface imagers. Similar instruments operating at visible wavelengths hold promise as compact, aberration-free color cameras. Parallel optical processing using metasystem arrays enables novel, compact instruments for scientific studies and consumer electronics.