ABSTRACT
An optoelectronic device includes all studies and applications on electronic devices that source, detect, and control light. Through the detectors, light signal will be converted to an electrical signal and then be processed by a voltage monitoring or current monitoring circuit. In wide bandwidth light, infrared (IR) light was extensively used from military to nonmilitary purposes. There are thousands of commercialized applications in industrial, scientific, and medical areas, including hyperspectral imaging in biological and mineralogical measurements; target acquisition and tracking, night vision in military applications [1]; IR data communications by standards published by IrDA; IR telescope in astronomy; environment monitoring in meteorology, and so on. It is also closely related to the human body, because humans at normal temperature can radiate around 12 μm wavelength IR light based on Wien’s displacement law.
