When you unlock a phone, step into view of a security camera or drive past a license plate reader at night, beams of infrared light - invisible to the naked eye — shine onto the unique contours of ...

Yang Guoliang, who has been under surveillance by Chinese officials after complaining about a land dispute to the central ...

Scientists in Switzerland have developed an ultra-thin metalens that converts invisible infrared light into visible light by halving its wavelength, using nanoscale patterns stamped into a special ...

When you unlock a phone, step into view of a security camera or drive past a license plate reader at night, beams of infrared ...