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Threading light into a nanometer hole in the shape of a "pretzel" and spiral grooves on the surface of a gold layer - an optical nanometer screw. On the right - screwing the light into the hole, on the left - electron microscope images of the nanometer optical screw.

Threading light into a nanometric hole in the shape of a "pretzel" and spiral grooves on the surface of a gold layer - an optical nanometer screw. On the right - screwing the light into the hole, on the left - electron microscope images of the nanometer optical screw.

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