A rendering of the metasurface chip in action. When hit with an infrared laser, the microscopic chip converts the incoming light to a higher frequency and sends it out as a narrow beam that can be precisely directed. Credit: T. Sun, edited Creating extremely small devices that can precisely guide and control light is a key challenge for many emerging technologies. Scientists at the Advanced Science Research Center at the CUNY Graduate Center (CUNY ASRC) have now made an important advance by