Spectral Invisibility Cloaking (IMAGE)

Optica

Spectral Invisibility Cloaking

Caption

A broadband wave illuminates an object, which reflects green light in the shown example, making the object detectable by an observer monitoring the wave. A spectral invisibility cloak transforms the blocked color (green) into other colors of the wave's spectrum. The wave propagates unaltered through the object, without 'seeing its color' and the cloak subsequently reverses the previous transformation, making the object invisible to the observer.

Credit

Luis Romero Cortés and José Azaña, Institut National de la Recherche Scientifique

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