Quadrilateral Mach–Zehnder interferometer chip (IMAGE) Optica Caption Researchers have created an optical chip that is based on a quadrilateral Mach–Zehnder interferometer network and is easy to reconfigure for various functions. Pictured are a microscope image of the chip (a) and a photo of the packaged chip (b). Credit Jianji Dong, Huazhong University of Science and Technology Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.