3D carpet invisibility cloak. […] Today, direct laser writing has allowed for the first three-dimensional invisibility cloaking structures. Lately, even visible operation frequencies have become accessible.
Source: Photonic Metamaterials (Center for Functional Nanostructures, Karlsruhe Institute of Technology)
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3D carpet invisibility cloak. […] Today, direct laser writing has allowed for the first three-dimensional invisibility cloaking structures. Lately, even visible operation frequencies have become accessible.

Source: Photonic Metamaterials (Center for Functional Nanostructures, Karlsruhe Institute of Technology)

(More info)