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- W2012054103 abstract "Avalanche photodiodes (APDs) have been fabricated in order to determine the impact ionization coefficients of electrons (α) and holes (β) in AlxGa1−xAsySb1−y lattice matched to GaSb for three alloy compositions: (x = 0.40, y = 0.035), (x = 0.55, y = 0.045), and (x = 0. 65, y = 0.054). The impact ionization coefficients were calculated from photomultiplication measurements made on specially designed APDs, which allowed for both pure electron and pure hole injection in the same device. Photo-multiplication measurements were made at temperatures ranging from 77 K to 300 K for all three alloys. A quasi-physical model with an explicit temperature dependence was used to express the impact ionization coefficients as a function of electric-field strength and temperature. For all three alloys, it was found that α < β at any given temperature. In addition, the values of the impact ionization coefficients were found to decrease as the aluminum concentration of the AlGaAsSb alloy was increased. A value between 1.2 and 4.0 was found for β/α, which is dependent on temperature, alloy composition, and electric-field strength." @default.
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- W2012054103 date "2014-04-21" @default.
- W2012054103 modified "2023-10-01" @default.
- W2012054103 title "Impact ionization in Al<sub>x</sub>Ga<sub>1−x</sub>As<sub>y</sub>Sb<sub>1−y</sub> avalanche photodiodes" @default.
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- W2012054103 doi "https://doi.org/10.1063/1.4872253" @default.
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