Science Daily   September 6, 2022 Researchers in Germany have developed an organic thin-film sensor that describes a completely new way of identifying the wavelength of light and achieves a spectral resolution below one nanometer. The principle of operation of the new sensor is that light of unknown wavelength excites luminescent materials in a hair-thin film. The film consists of a mixture of phosphorescent and fluorescent entities, which absorb the light under investigation in different ways. The intensity of the afterglow can be used to infer the wavelength of the unknown input light. They exploited the fundamental physics of excited states […]