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.