Color of Nanoparticles Depends What Type of Light Shines on Them (image) Harvard University Share Print E-Mail Caption The color output of a new type of optical filter created at Harvard depends on the polarization of the incoming light. Credit Image courtesy of Tal Ellenbogen. Usage Restrictions None Share Print E-Mail 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.