Recent Studies on Cloaks of invisibility

Invisibility Cloak And Ultra-powerful Microscopes: New Research Field Promises Radical Advances In Optical Technologies: A new research field called transformation optics may usher in a host of radical advances including a cloak of invisibility and ultra-powerful microscopes and computers by harnessing nanotechnology and "metamaterials."[1]
Invisibility Undone: Chinese Scientists Demonstrate How To Uncloak An Invisible Object: Harry Potter beware! A team of Chinese scientists has developed a way to unmask your invisibility cloak. According to a new paper in Optics Express certain materials underneath an invisibility cloak would allow invisible objects be seen again.[2]
Tsunami Invisibility Cloak Could Make Structures 'Disappear': Rather than building stronger ocean-based structures to withstand tsunamis, it might be easier to simply make the structures disappear.[3]
3D 'Invisibility Cloak' For Sound?: Contrary to earlier predictions, Duke University engineers have found that a three-dimensional sound cloak is possible, at least in theory. Such an acoustic veil would do for sound what the "invisibility cloak" previously demonstrated by the research team does for microwaves -- allowing sound waves to travel seamlessly around it and emerge on the other side without distortion.[4]
2-D Invisibility Cloak For Visible Light Created: Scientists have used plasmon technology to create the world's first invisibility cloak for visible light. The engineers have applied the same technology to build a revolutionary superlens microscope that allows scientists to see details of previously undetectable nanoscale objects.[5]
Invisibility Cloak: New Technique To Control Nanoparticles: Scientists have created a version of Harry Potter's famed "invisibility cloak" for nanoparticles. Researchers demonstrate that controlling the structure of nanoparticles can "shrink" their visible size by a factor of thousands without affecting a particle's actual physical dimension.[6]