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Optical Engineering

Three-dimensional modeling and simulation of large-format hybrid indium antimonide detector arrays
Author(s): Li-Wen Zhang; Ming Shao; Xiao-Ling Zhang; Qing-Duan Meng; Jin-Chan Wang; Yanqiu Lv
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Paper Abstract

Infrared sensors, such as indium antimonide (InSb) detectors, are generally required to be cooled to 77 K in operation. High fracture probability under thermal shock, especially in large InSb infrared focal plane arrays (IRFPAs), limits their applicability. It is necessary to establish a realistic three-dimensional (3-D) structural model of large-format InSb IRFPAs. However, few data are available on 3-D high-fidelity structural modeling and simulation of large IRFPAs due to their complicated structure and huge meshing numbers. A simple equivalent modeling method had been used in our early works, which could reduce meshing numbers, but did not consider the complicated structure, and also brought a new problem that the equivalent outer region of the model was not consistent with the actual IRFPAs. To solve the problems, an improved equivalent modeling method is proposed, where a small-format array is first split into two parts and then employed to equivalently replace the real large-format array. A 3-D high-fidelity structural model of large-format hybrid InSb IRFPAs is developed; here, a 32×32 array is adopted to replace the real 128×128 array. The results show that the simulated stress and strain distribution characteristics of InSb chip are well in agreement with the fracture photograph of actual 128×128 InSb IRFPAs in testing, verifying the validity and feasibility of the 3-D structural model of large-format IRFPAs. All these are beneficial to further explore fracture mechanisms and improve the reliability of large-format hybrid InSb IRFPAs.

Paper Details

Date Published: 15 October 2013
PDF: 8 pages
Opt. Eng. 52(10) 103110 doi: 10.1117/1.OE.52.10.103110
Published in: Optical Engineering Volume 52, Issue 10
Show Author Affiliations
Li-Wen Zhang, Henan Univ. of Science and Technology (China)
Ming Shao, People's Liberation Army (China)
Xiao-Ling Zhang, Henan Univ. of Science and Technology (China)
Qing-Duan Meng, Henan Univ. of Science and Technology (China)
Jin-Chan Wang, Henan Univ. of Science and Technology (China)
Yanqiu Lv, Luoyang Institute of Electro-Optical Equipment (China)

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