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Now the researchers want to increase the performance of photodiodes by engineering the stack of layers that comprise the photodetector device.

These used a mirror to 'scan' a vertical slice of the terrain, digitizing the light with a photodetector.

Near-room-temperature mid-infrared quantum well photodetector.

Youngblood, N., Chen, C., Koester, S. J. & Li, M. Waveguide-integrated black phosphorus photodetector with high responsivity and low dark current.

Polarization-sensitive broadband photodetector using a black phosphorus vertical p–n junction.