Infrared thermal emitters, which convert heat into light, are used in a number of applications, including chemical analysis, biosensing and thermal imaging. However, conventional devices do suffer from a very slow switching speed because the intensity of light they emit depends on the surrounding temperature, which is difficult to control on short time scales. Now, researchers at Kyoto University in Japan, have made a new type of thermal emission device that is 10,000 faster than previous ones and which has a spectral bandwidth that is 70 times narrower than that of a blackbody spectrum…..
http://nanotechweb.org/cws/article/tech/58134
