Share Email Print
cover

Optical Engineering

Radiometric characterization of long-wavelength infrared type II strained layer superlattice focal plane array under low-photon irradiance conditions
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We present the results of the radiometric characterization of an "M" structure long wavelength infrared Type-II strained layer superlattice (SLS) infrared focal plane array (IRFPA) developed by Northwestern University (NWU). The performance of the M-structure SLS IRFPA was radiometrically characterized as a function of photon irradiance, integration time, operating temperature, and detector bias. Its performance is described using standard figures of merit: responsivity, noise, and noise equivalent irradiance. Assuming background limited performance operation at higher irradiances, the detector quantum efficiency for the SLS detector array is approximately 57%. The detector dark density at 80 K is 142  μA/cm2, which represents a factor of seven reduction from previously measured devices.

Paper Details

Date Published: 8 June 2012
PDF: 9 pages
Opt. Eng. 51(6) 064002 doi: 10.1117/1.OE.51.6.064002
Published in: Optical Engineering Volume 51, Issue 6
Show Author Affiliations
John E. Hubbs, Air Force Research Lab. (United States)
Vaidya Nathan, Air Force Research Lab. (United States)
Meimei Z. Tidrow, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Manijeh Razeghi, Northwestern Univ. (United States)


© SPIE. Terms of Use
Back to Top