19 October 2016 Low dark current LWIR and VLWIR HgCdTe focal plane arrays at AIM
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Abstract
In this paper AIM presents an update on its results for both n-on-p and p-on-n low dark current planar MCT photodiode technology LWIR and VLWIR two-dimensional focal plane detector arrays with a cut-off wavelength >11μm at 80K and a 640×512 pixel format. The arrays are stitched from two 512×320 pixel photodiode arrays at a 20μm pixel pitch. Thermal dark currents significantly reduced as compared to ‘Tennant’s Rule 07’ at a yet good detection efficiency <60% as well as results from NETD and photo response performance characterization are presented over a wide operating temperature range. The improvements made allow for the same dark current performance at a 20K higher operating temperature than with previous AIM technology. The demonstrated detector performance paces the way for a new generation of higher operating temperature low SWaP LWIR MCT FPAs with a <30mK NETD up to a 110K detector operating temperature and with good operability. Alternatively, lower dark currents at common operating temperatures may be attained, enabling cutting edge next generation LWIR/VLWIR detectors for space instruments.
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S. Hanna, D. Eich, W. Fick, H. Figgemeier, M. Mahlein, W. Schirmacher, R. Thöt, "Low dark current LWIR and VLWIR HgCdTe focal plane arrays at AIM", Proc. SPIE 10000, Sensors, Systems, and Next-Generation Satellites XX, 100000P (19 October 2016); doi: 10.1117/12.2244514; https://doi.org/10.1117/12.2244514
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