These images are from an experiment that found nanoscale diamonds can behave like photonic crystals.

These images are from an experiment that found nanoscale diamonds can behave like photonic crystals.​​Photonic crystals have a structure that absorbs light in specific frequency bands, allowing for a fine control and manipulation of light. In nature, photonic crystals can be found in butterfly wings and opals. Chameleons have photonic crystals embedded in their skin - this allows them to change their colours.​​We currently use polymer photonic crystals for things such as reflective lens coatings. Diamond, which is more reflective and robust, could broaden the range of ways we use photonic crystals.​​: Grichko et al., Nanotechnology, 2008 -- source link
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