Nanostructured materials for sensing and imaging

From semiconductor quantum well structures to the currently hottest metamaterials, the conquest of nano-world has been occurring in almost every field of research. In the field of quantum well structures for infrared photodetection, the inclusion of dilute nitride layers in the mature GaAs based quantum well structures results in a TE dominate photocurrent and the incorporation of nitrogen in the narrow bandgap InSb materials makes it possible for wide band infrared absorption covering mid and long wavelength infrared range. With the nanostructured materials made of metal and dielectric composites, visible light can be manipulated, which has potential application for super resolution imaging beyond diffraction limit.