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Proceedings Paper

Short-wave infrared GaInAsSb photodiodes grown on GaAs substrates
Author(s): Andrew R. J. Marshall; Kalyan Nunna; Siew Li Tan; Charles J. Reyner; Baolai Liang; Anitha Jallipalli; John P. R. David; D. L. Huffaker
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Paper Abstract

We report on the growth, fabrication and characterization of GaInAsSb p-i-n photodiodes with a high sensitivity in the short-wave infrared. Uniquely these photodiodes are grown on a GaAs substrate using the interfacial misfit array technique, which accommodates the lattice mismatch at an abrupt GaAs/GaSb interface. Top illuminated mesa photodiodes with varying area were fabricated and characterized at room temperature. A zero bias resistance area product of 260 Ωcm2 is measured, together with a responsivity of up to 0.8 AW-1 without an anti-reflection coating. The D* at zero bias is estimated to be 4.5x1010 Hz1/2W-1 which is approaching the best results reported for GaInAsSb photodiodes. Hence this work presents a promising alternative to GaInAsSb detectors grown lattice matched on GaSb substrates, strained InGaAs detectors grown on InP substrates or HgCdTe detectors. Making use of cheaper GaAs substrates, available in larger diameters and dry etch chemistry, the GaInAsSb photodiode technology reported here is particularly well placed to support future lower cost, larger area focal plane arrays approaching gigapixel resolution.

Paper Details

Date Published: 24 October 2012
PDF: 8 pages
Proc. SPIE 8541, Electro-Optical and Infrared Systems: Technology and Applications IX, 85410F (24 October 2012); doi: 10.1117/12.974765
Show Author Affiliations
Andrew R. J. Marshall, Lancaster Univ. (United Kingdom)
Kalyan Nunna, California NanoSystems Institute (United States)
Siew Li Tan, The Univ. of Sheffield (United Kingdom)
Charles J. Reyner, Univ. of California, Los Angeles (United States)
Baolai Liang, California NanoSystems Institute (United States)
Anitha Jallipalli, Univ. of California, Los Angeles (United States)
John P. R. David, The Univ. of Sheffield (United Kingdom)
D. L. Huffaker, California NanoSystems Institute (United States)
Univ. of California, Los Angeles (United States)

Published in SPIE Proceedings Vol. 8541:
Electro-Optical and Infrared Systems: Technology and Applications IX
David A. Huckridge; Reinhard R. Ebert, Editor(s)

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