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Proceedings Paper

Quaternary GaInAsSb 2.0-2.5 micron back-illuminated focal plane array for blood glucose monitoring
Author(s): John P. Prineas; Madhusudhana Reddy; Jonathon T. Olesberg; Chuanshun Cao; Saravanan Veerasamy; Michael E. Flatte; Edwin Koerperick; Thomas F. Boggess; Michael R. Santilli; Linda J. Olafsen
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Paper Abstract

A focal plane array detector sensitive from 2.0-2.5 μm and consisting of 32, 1.0 mm x 50 μm pixels, all functional, is demonstrated. Mean room-temperature R0A is found to be 1.0 Ωcm2, limited by sidewall leakage. The focal plane array is fabricated from an MBE-grown homojunction p-i-n GaInAsSb grown on an n-type GaSb substrate. Back-illumination geometry is compared to front-illumination geometry and is found to be favorable, particularly the improved responsivity (1.3 A/W at 2.35 μm corresponding to 68% quantum efficiency) due to reflection of light off the metal contact. Further, back-illumination is the most convenient geometry for mounting the array onto a compact blood glucose sensor because both contacts can be mounted on one side, while detector illumination occurs on the other.

Paper Details

Date Published: 7 April 2005
PDF: 9 pages
Proc. SPIE 5726, Semiconductor Photodetectors II, (7 April 2005); doi: 10.1117/12.590820
Show Author Affiliations
John P. Prineas, Univ. of Iowa (United States)
Madhusudhana Reddy, Univ. of Iowa (United States)
Jonathon T. Olesberg, Univ. of Iowa (United States)
Chuanshun Cao, Univ. of Iowa (United States)
Saravanan Veerasamy, Univ. of Iowa (United States)
Michael E. Flatte, Univ. of Iowa (United States)
Edwin Koerperick, Univ. of Iowa (United States)
Thomas F. Boggess, Univ. of Iowa (United States)
Michael R. Santilli, Univ. of Kansas (United States)
Linda J. Olafsen, Univ. of Kansas (United States)


Published in SPIE Proceedings Vol. 5726:
Semiconductor Photodetectors II
Marshall J. Cohen; Eustace L. Dereniak, Editor(s)

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