ABSTRACT
Quantum efficiency (QE) is a figure-of-merit of a photon detector. QE is equal to the percentage of incident photons that are converted by the detector into electrons that constitute a measurable signal. QE applies to detectors spanning a wavelength range from the far infrared (IR) to gamma rays because these are all photons. A detector's QE is affected by many variables: wavelength (of radiation), surface reflectance(s), absorption coefficient(s), layer thickness(es), frequency response, bulk and surface recombination, doping level(s), device configuration, etc.
