Towards Dualband Megapixel QWIP Focal Plane Arrays
Journal article (preprint)
CALIFORNIA INST OF TECHNOLOGY PASADENA JET PROPULSION LAB
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Mid-wavelength infrared MWIR and long-wavelength infrared LWIR 1024 x 1024 pixel quantum well infrared photodetector QWIP focal planes have been demonstrated with excellent imaging performance. The MWIR QWIP detector array has demonstrated a noise equivalent differential temperature of NEdeltaT 17 mK at a 95 K operating temperature with f2.5 optics at 300 K background, and the LWIR detector array has demonstrated a NEdeltaT of 13 mK at a 70 K operating temperature with the same optical and background conditions as the MWIR detector array after the subtraction of system noise. Both MWIR and LWIR focal planes have shown background limited performance BLIP at 90 K and 70 K operating temperatures respectively, with similar optical and background conditions. In addition, we have demonstrated MWIR and LWIR pixel co-registered simultaneously readable dualband QWIP focal plane arrays. In this paper, we will discuss the performance in terms of quantum efficiency, NEdeltaT, uniformity, operability, and modulation transfer functions of the 1024 x 1024 pixel arrays and the progress of dualband QWIP focal plane array development work.
- Infrared Detection and Detectors
- Radiofrequency Wave Propagation