Accession Number:

ADA576456

Title:

Radiation Tolerance Characterization of Dual Band InAs/GaSb Type-II Strain-Layer Superlattice pBp Detectors Using 63 MeV Protons

Descriptive Note:

Conference paper

Corporate Author:

AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE

Personal Author(s):

• Cowan, V. M.
• Morath, C. P.
• Hubbs, J. E.
• Myers, S.
• Plis, E.
• Krishna, S.

Report Date:

2012-01-01

Pagination or Media Count:

6.0

Abstract:

The radiation tolerance characterization of dual band InAsGaSb type-II strain-layer superlattice pBp detectors of varying size using 63 MeV proton irradiation is presented. The detectors mid-wave infrared performance degraded with increasing proton fluence PhiP up to 3.75 x 10exp 12sq cm or, equivalently, a total ionizing dose500 kRad Si. At this PhiP, an 31 drop in quantum efficiency g, 2 order increase in dark current density JD, and consequently, 1 order drop in calculated detectivity D were observed. Proton damage factors were determined for g and D. Arrhenius-analysis of temperature-dependent JD measurements reflected significant changes in the activation energies following irradiation.

Descriptors:

• *INFRARED DETECTORS
• RADIATION TOLERANCE
• SUPERLATTICES

Subject Categories:

• Infrared Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE