Interesting new spectrometer chip.
"Engineers at the University of Wisconsin-Madison have developed a spectrometer that is so small and simple that it could integrate with the camera of a typical cell phone without sacrificing accuracy. The device contains photodetector arrays overlaid with photonic-crystal slabs placed on top of the detector pixels, giving each pixel region a different spectral response "
From: https://www.laserfocusworld.com/tes..._content=2019-05-30&eid=288603299&bid=2456108
Larger article and good graphic explanation see: https://www.nature.com/articles/s41467-019-08994-5
"Engineers at the University of Wisconsin-Madison have developed a spectrometer that is so small and simple that it could integrate with the camera of a typical cell phone without sacrificing accuracy. The device contains photodetector arrays overlaid with photonic-crystal slabs placed on top of the detector pixels, giving each pixel region a different spectral response "
From: https://www.laserfocusworld.com/tes..._content=2019-05-30&eid=288603299&bid=2456108
Larger article and good graphic explanation see: https://www.nature.com/articles/s41467-019-08994-5