Infrared Detector Improves Night-Vision Capabilities at Room Temperature

Researchers at the University of Central Florida (UCF) have devised a strategy for uncooled, tunable, multispectral infrared (IR) detection. The team showed that room-temperature photodetection using 2D monolayer graphene is possible through the interplay of tunable, enhanced IR absorption induced by localized Dirac plasmonic excitations, graphene mobility engineering, and excitation of asymmetric hot carriers and the resulting electronic photothermoelectric effect. The key to developing the new highly sensitive, but uncooled IR detector was engineering the 2D nanomaterial graphene into a material that could carry an electric current. The researchers achieved this by designing the material to be asymmetric, so that the temperature...