Quaternary GaInAsSb 2.0-2.5 micron back-illuminated focal plane array for blood glucose monitoring

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

doi:10.1117/12.590820

7 April 2005 Quaternary GaInAsSb 2.0-2.5 micron back-illuminated focal plane array for blood glucose monitoring

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

Author Affiliations +

Proceedings Volume 5726, Semiconductor Photodetectors II; (2005) https://doi.org/10.1117/12.590820
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

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.

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John P. Prineas, Madhusudhana Reddy, Jonathon T. Olesberg, Chuanshun Cao, Saravanan Veerasamy, Michael E. Flatte, Edwin Koerperick, Thomas F. Boggess, Michael R. Santilli, and Linda J. Olafsen "Quaternary GaInAsSb 2.0-2.5 micron back-illuminated focal plane array for blood glucose monitoring", Proc. SPIE 5726, Semiconductor Photodetectors II, (7 April 2005); https://doi.org/10.1117/12.590820

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