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.