A display that completely blocks off counterfeits

EurekAlert  January 22, 2021 Researchers in South Korea have developed a device using nanostructures that is capable of encrypting full-color images depending on the polarization of light. The on and off states can be adjusted according to the polarization of the incident light. It displays full-color images during the on state and shows no images in the off state and it can switch between different images. According to the researchers this feature can be utilized as an anti-forgery device security label that appears to be a simple color image to the naked eye but reveals the serial number when a […]