PT - JOURNAL ARTICLE AU - McClung, Andrew AU - Samudrala, Sarath AU - Torfeh, Mahsa AU - Mansouree, Mahdad AU - Arbabi, Amir TI - Snapshot spectral imaging with parallel metasystems AID - 10.1126/sciadv.abc7646 DP - 2020 Sep 01 TA - Science Advances PG - eabc7646 VI - 6 IP - 38 4099 - http://advances.sciencemag.org/content/6/38/eabc7646.short 4100 - http://advances.sciencemag.org/content/6/38/eabc7646.full SO - Sci Adv2020 Sep 01; 6 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.