A Color-Neutral, Gd Nanoparticle Switchable Mirror with Improved Optical Contrast and Response Time


  • I. Aruna is grateful to the University Grants Commission, India, for providing the Junior Research Fellowship for carrying out this work.


An all-round improvement of the switchable mirror characteristics of any rare earth metal system can be achieved by utilizing two characteristics of nanoparticles: the size-dependent blue shift in the absorption edge and large surface area. Gd nanoparticles show better color neutrality in comparison with polycrystalline, alloy, and multilayer films, and also exhibit increased optical contrast and faster response time than polycrystalline films.