Long Wave Photomultiplier

The proposed work will develop a sensitive photodetector, tailored for the 950 nm through 1100 nm region, with photomultiplier characteristics. The innovative approach is the use of a transferred electron photo-cathode intensified photodiode (TE-IPD), consisting of an InP/InGaAlAs photo-cathode whose output electrons are focused onto a high speed Avalanche Photo-Diode (the device's anode) within a vacuum envelope. Predicted performance includes a quantum efficiency of about 3%, a noise factor of approximately 1.3, a rise time of about 200 picoseconds and a gain of greater than 20,000. The primary Phase I objectives include the development of a prototype device with these performance values, and its complete evaluation and characterization. In Phase II, the photodetector will be optimized, and tailored for specific applications. EOO, Inc. and its subcontractor INTEVAC will perform the proposed work. Phase II will provide five final-form 1060 nm sensitive TE-IPD's.