Part of the pink object is rendered invisbile to the naked eye under the calcite-based invisibility cloak (Image: Baile Zhang and G. Barbastathis/SMART Centre)
The wedge measuring 38mm x 10mm x 2mm visible to the naked eye.
Part of the pink object is rendered invisbile to the naked eye under the calcite-based invisibility cloak
The quest to build a working “invisibility cloak” generally focuses on the use of metamaterials – artificially engineered materials with a negative refractive index that have already been used to render microscopic objects invisible in specific wavelengths of light. Now, using naturally occurring crystals rather than metamaterials, two research teams working independently have demonstrated technology that can cloak larger objects in the broad range of wavelengths visible to the human eye.
Other Images from this Gallery