Photon detector (IMAGE) Optica Caption Researchers developed a new waveguide optical parametric amplifier (OPA) module, which they combined with a specially designed photon detector (pictured) to generate strongly nonclassical light that can be used for quantum experiments. Credit Kan Takase, University of Tokyo Usage Restrictions None License Licensed 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.