‘Interference’ Changes Colors At An Atomic Level

16.10.2012 @ HuffingtonPost

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The vivid colors appear in the puddles because of interference: the crests and troughs of light waves interfere with each other as they pass through the oil into the water and reflect back up into the air, with some colors (wavelengths) appearing brighter than others.

This is the same effect that applied physics professor Federico Capasso and graduate students Mikhail Kats, Romain Blanchard, and Patrice Genenvet sought to simulate in their research. Only this time, the scientists are working with metals instead of translucent liquids — germanium-coated gold sheets to exact.

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