Optical metacage blocks light from entering or escaping

(Phys.org)—Physicists have built a nanowire cage that blocks one or more wavelengths of light from either entering or escaping, yet allows liquids and gases to pass through the small gaps between the nanowires. The "optical metacage" takes advantage of the optical properties of nanowire structures, and could have applications including protecting microorganisms from radiation, optically shielding nanophotonics components, and laser-driven drug delivery.

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