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Extended wavelength InGaAs SWIR FPAs with high performance
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Paper Abstract

The extended InGaAs short wavelength infrared (SWIR) detector covers 1.0-2.5 μm wavelength, which plays an important role in weather forecast, resource observation, low light level systems, and astronomical observation and so on. In order to fabricate the high performance extended InGaAs detector, materials structure and parameters were characterized with Scanning Capacitance Microscopy (SCM), Scanning Spreading Resistance Microscopy (SSRM), the spreading of minority carriers and lattice quality were obtained. Mesa etching process, etching damage restoration technique and low temperature passivation technique were used in the fabrication of the extended InGaAs detector. The improvement of material structure and device process was studied by fabricating and measuring different perimeter-to-area (P/A) photodiodes and singledevice, respectively. The dark current density of the extended InGaAs detector obviously was reduced, about 2 nA/cm2 at 170 K. The 512×256 FPAs were fabricated, the peak detectivity and the quantum efficiency of which are 5×1011 cmHz1/2/W and 80%, respectively. The staring image yielded of the 512×256 FPAs is shown, which demonstrates very good imaging quality.

Paper Details

Date Published: 7 September 2017
PDF: 7 pages
Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040C (7 September 2017); doi: 10.1117/12.2273550
Show Author Affiliations
Xue Li, Shanghai Institute of Technical Physics (China)
Tao Li, Shanghai Institute of Technical Physics (China)
Chunlei Yu, Shanghai Institute of Technical Physics (China)
Hengjing Tang, Shanghai Institute of Technical Physics (China)
Shuangyan Deng, Shanghai Institute of Technical Physics (China)
Xiumei Shao, Shanghai Institute of Technical Physics (China)
Yonggang Zhang, Shanghai Institute of Microsystem and Information Technology (China)
Haimei Gong, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 10404:
Infrared Sensors, Devices, and Applications VII
Paul D. LeVan; Ashok K. Sood; Priyalal Wijewarnasuriya; Arvind I. D'Souza, Editor(s)

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