Light Filtering Nanostructure Produces 'Plasmonic Halos' (image) Boston College Caption Boston College researchers have constructed a unique nanostructure that exploits microcavity features to filter visible light into "plasmonic halos" of selected color output. The device could have applications in areas such as biomedical plasmonics or discrete optical filtering. Credit Nano Letters Usage Restrictions None 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.