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Twisted light: The Edison bulb has purpose again
Forget LEDs, researchers from the University of Michigan have developed a new type of incandescent light bulb. The device is capable of emitting elliptically polarized light, described as "twisted" light.
By integrating micro- and nanoscale twists into the tungsten filament structure, the light wave inherits that helical shape, effectively making it elliptically polarized. Changing the light's polarization characteristics in this manner mimics things found in nature, like the ridiculously sophisticated and specialized vision of the mantis shrimp. With 12 types of photoreceptors (compared to humans' piddly three – red, green, and blue), mantis shrimp can see all the colors, including parts of the ultraviolet and infrared spectrum.
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