Fig. 5: Infrared encoded data and images.
From: Covert infrared image encoding through imprinted plasmonic cavities
a Image of the Afghan Girl (Copyright Steve McCurry/Magnum Photos. Image rights granted by Magnum Photos New York) which is encoded into the plasmonic surface by mapping hole diameter to infrared grayscale. b Visible camera (EOS Rebel T6i, Canon) and c infrared image of the encoded MWIR surface taken with a cooled indium antimonide detector (A8300sc, FLIR). The MWIR Afghan Girl encode device is 1 × 0.75 mm2 in size. The same procedure is conducted for the LWIR domain and images to be encoded are d that of Einstein and a QR code from our website (http:/nanoscience.ucf.edu/chanda). e A visible camera (EOS Rebel T6i, Canon) and f LWIR infrared images taken with an uncooled VOx microbolometer camera (HD-1024, St. Johns Optical Systems). The Einstein encoded sample area is 1.25 × 1 mm2, and the QR code is 1 × 1 mm2
