Just a few years ago, it was speculated that a real-life invisibility cloak could only be applied to a very narrow set of wavelengths for a few specific configurations. It was thought inconceivable that large, macroscopic objects could be cloaked to a huge variety of wavelengths.
Today, an advance in metalenses, by guiding light of various wavelengths to the proper location to get the distortion-free outcome we so keenly desire, might be just the discovery we need to herald the arrival of a true cloaking device.
As Star Trek first envisioned it, it took centuries for cloaking technology to be perfected. Here on Earth, it may require a mere decade or two. If this latest metalens advance can be rapidly applied to metamaterial cloaks, an optical, 3D cloaking device may finally become a reality in humanity’s very near future.