Schematic of the Device (IMAGE) Imperial College London Caption These are nanofocusing and optical mode properties of the organic hybrid gap plasmon waveguide on the silicon platform used for degenerate four-wave mixing. The insets depict the scaled electromagnetic mode distributions for a wide metal gap of 500 nm and a narrow metal gap of 25 nm, along with the chemical formula for MEH-PPV. Credit Nielsen et al., 2017/Imperial College London 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.