Diffraction-Grating-Coupled High Quantum Efficiency InP/InGaAs Quantum Well Infrared Photodetector Focal Plane Array

Arslan, Yetkin
Colakoglu, Tahir
Beşikci, Cengiz
Quantum well infrared photodetector (QWIP) is still the sole field proven low-cost long-wavelength infrared photon sensor. We report an impressively high quantum efficiency of 31% in the pixels of a large format (640 x 512) grating-coupled InP/In0.48Ga0.52As QWIP focal plane array (FPA). The InP/InGaAs QWIP FPA with a cut-off wavelength of similar to 9 mu m provided desirable characteristics at a temperature as high as 78 K. The noise-equivalent temperature difference of the FPA with f/2 optics is similar to 30 mK with an integration time as low as 1 ms at 67 K. We also present a thorough comparison of InP and GaAs-based QWIPs for long-wavelength infrared thermal imaging and shed light on the characteristic differences between these devices to be used as a guide for improving the performance of this important sensor technology. The results clearly indicate that the main limitations of the standard QWIP technology can be overcome through the utilization of alternative material systems and proper FPA processing techniques.


Investigation of warpage behavior of single crystal silicon on a silicon Adhesive ceramic integrated structure at cryogenic temperatures
Baloğlu, Can; Okutucu Özyurt, Hanife Tuba; Dursunkaya, Zafer (2016-03-17)
Understanding thermal stress and warpage behavior of heterogeneous component assemblies is vital in infrared sensor applications of silicon semiconductor material. The silicon semiconductor warpage behavior of the integrated structure composed of silicon material itself, an adhesive layer and a ceramic layer is analyzed by both FEM and experimental studies. The studies are performed between room temperature and 80 K. Thickness of each layer has an effect on the warpage. The silicon warpage of the initial ba...
Metamaterial based wideband infrared absorbers
Üstün, Kadir; Sayan, Gönül; Department of Electrical and Electronics Engineering (2017)
In this thesis, design and simulation of wideband metamaterial absorbers are investigated in the long wave infrared (LWIR) and the mid-wave infrared (MWIR) bands of the electromagnetic spectrum. Use of LWIR and MWIR bands in absorber design is especially important for critical applications including the design of thermal cameras and thermal emitters. Integration of metamaterial topologies into the absorber structures provides flexibilities in design to enhance the operation efficiency of these devices by in...
High performance focal plane array technologies from short to long wavelength infrared bands
Arslan, Yetkin; Beşikci, Cengiz; Department of Electrical and Electronics Engineering (2014)
This thesis work covers the development of three different state of the art infrared sensor technologies: quantum well infrared photodetectors (QWIPs), HgCdTe sensors and extended InGaAs photodetectors. QWIP is the leading member of the quantum structure infrared photodetector family providing excellent uniformity and stability with field proven performance. The utilization of the InP/In0.48Ga0.52As multi-quantum well structure (instead of the standard AlGaAs/GaAs material system) for the implementation of ...
High performance near/short wavelength infrared megapixel InGaAs focal plane array fabrication development and new design proposals
Karaca, Utku; Kocaman, Serdar; Department of Electrical and Electronics Engineering (2018)
In0.53Ga0.47As is the most appropriate material system for Short Wavelength Infrared (SWIR) detection at ~1.7 μm cutoff wavelength with its relatively lower cost and high performance. Ultra-low dark current (~ nA/cm2) has been recently demonstrated in InGaAs photodetectors with planar type process by eliminating surface leakage current. Here, a fabrication procedure for planar InGaAs photodetectors with unique pixel isolation methods has been developed and ~10 nA/cm2 dark current density levels were obtaine...
Optimizing heat exchanger parameters of a joulethomson cryogenic cooler to improve the cooling performance
Baki, Murat; Okutucu Özyurt, Hanife Tuba; Sert, Cüneyt; Department of Mechanical Engineering (2018)
Cryocoolers are one of the key components of cooled infrared (IR) imaging systems, where it is not possible to form an image in photon detectors without decreasing the sensor temperature to cryogenic temperatures. In detector cooling applications where low cool down times, small size and weight are required, mostly Joule Thomson (JT) cryocoolers are preferred. The aim of this study is to analyze the heat exchanger of a JT cryocooler operating with argon as the working gas, numerically and optimize its desig...
Citation Formats
Y. Arslan, T. Colakoglu, and C. Beşikci, “Diffraction-Grating-Coupled High Quantum Efficiency InP/InGaAs Quantum Well Infrared Photodetector Focal Plane Array,” IEEE JOURNAL OF QUANTUM ELECTRONICS, pp. 186–195, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35017.