Nanophotonic circuits, tiny chips which filter and steer light, suffer from small random variations which degrade the transmission of light. Researchers have now found a way to compensate those variations, which may lead to energy savings in datacenters and computer equipment. The researchers from Utrecht University (Debye Institute), University of Twente (MESA+ Institute for Nanotechnology) and Thales Research & Technology France published their results in the leading optical journal Optics Express on 21 February.