Carbon nanotube sheets create invisibility: This invisibility for light oblique to the nanotube sheets is caused by the mirage effect (photothermal deflection), in which a thermally generated refractive index gradient bends light array from a hidden object.
“The remarkable performance of nanotube sheets suggests possible applications as photo-deflectors and for switchable invisibility cloaks, and provides useful insights into their use as thermoacoustic projectors and sonar,” the authors say.
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