Light-Trapping Nanocubes Drive Inexpensive Multispectral Camera

Light-Trapping Nanocubes Drive Inexpensive Multispectral Camera

Researchers at Duke University have demonstrated
photodetectors that could span an unprecedented range of light frequencies by using on-chip
spectral filters created by tailored electromagnetic materials. The combination of multiple photodetectors
with different frequency responses on a single chip could enable lightweight, inexpensive
multispectral cameras for applications such as cancer surgery, food safety inspection
and precision agriculture. A typical camera only captures visible light,
which is a small fraction of the available spectrum. Other cameras might specialize in infrared
or ultraviolet wavelengths, but few can capture light from disparate points along the spectrum. And those that can suffer from a lot of drawbacks,
such as complicated and unreliable fabrication, slow functional speeds, bulkiness that can
make them difficult to transport, and costs up to hundreds of thousands of dollars. In research appearing in the journal Nature
Materials, Duke researchers demonstrate a new type of broad-spectrum photodetector that
can be implemented on a single chip, allowing it to capture a multispectral image in a few
trillionths of a second and be produced for just tens of dollars. The technology is based on physics called
plasmonics—the use of nanoscale physical phenomena to trap certain frequencies of light.

One Comments

  • h7opolo

    November 26, 2019

    hmm, plasmonics is a new field to me. i am very interested in the application of this proposed technology so laypersons can extend the human capability of sight.


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