Large-Area, High-Uniformity Photodiodes for Infrared Trap Detectors

methyst Research Inc. will design, fabricate and test a high uniformity, large area, low noise infrared trap-detector detector for the 1- 4.5 μm wavelength range. This state of the art detector will have a large area (e.g., 1-1.8 cm diameter active area) with a spatial variability of internal quantum efficiency of less than 0.1 % between 1 μm and 4.5 μm. In addition, the internal quantum efficiency of the detectors (i.e., the device efficiency after taking into account the radiation loss due to front-surface reflection) will be close to unity. The Phase I effort will consist of a proof-of-principle demonstration of large area, high-uniformity photodiodes that operate at 1 to 3 μm wavelengths.