Optimization of light polarization sensitivity in QWIP detectors |
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| Institution: | 1. Institute of Medical Sociology, Health Services Research and Rehabilitation Science (IMVR), Faculty of Human Sciences and Faculty of Medicine, University of Cologne, Eupener Strasse 129, 50933 Cologne, Germany;2. Department of Gynaecology and Obstetrics and Comprehensive Cancer Center, Ludwig Maximilian University, Marchioninistrasse 15, 81377 Munich, Germany;3. Institute of Psychology, University of Education Freiburg, Kunzenweg 21, 79117 Freiburg, Germany;1. National Institute of Research and Development for Technical Physics, Iasi, Romania;2. Research Center on Advanced Materials and Technologies, Alexandru Ioan Cuza University, Iasi, Romania;3. WMG, University of Warwick, Coventry, UK;4. Faculty of Physics, Alexandru Ioan Cuza University, Iasi;1. Division of Surgery, Indian Veterinary Research Institute, Izatnagar, India;2. Division of Veterinary Clinical Complex, FVSc & AH, SKUAST-Kashmir, India;3. Division of Animal Biotechnology, FVSc & AH, SKUAST-Kashmir, India;4. Division of Veterinary Pathology, FVSc & AH, SKUAST-Kashmir, India;5. Division of Physiology & Climatology, Indian Veterinary Research Institute, Izatnagar, India;1. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. Convergence of IT Devices Institute, Dong-Eui University, Busan 614-714, South Korea;2. Department of Radiological Science, Dong-Eui University, Busan 614-714, South Korea |
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| Abstract: | The current development of QWIPs (Quantum Well Infrared Photodetectors) at III–V Lab led to the production of 20 μm pitch, mid-format and full TV-format LWIR starring arrays with excellent performances, uniformity and stability. At the present time III–V Lab, together with TOL (Thales Optronics Ltd.) and SOFRADIR (Société Française de Détecteurs Infrarouges), work on the demonstration of a 20 μm pitch, 640 × 512 LWIR focal plane array (FPA) which detects the incident IR light polarization. Manufactured objects present a strong linear polarization signature in thermal emission. It is of high interest to achieve a detector able to measure precisely the degree of linear polarization, in order to distinguish artificial and natural objects in the observed scene.In this paper, we present a theoretical investigation of the optical coupling in polarization sensitive pixels. The QWIP modeling is performed by the Finite Difference Time Domain (FDTD) method. The aim is to optimize the sensitivity to light polarization as well as the performance of the detector. |
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