High performance multi-layer MWIR HgCdTe detector design requires detailed analysis considering the interaction between layers and the nonlinear effects. For this purpose, an in-house numerical model is utilized so that electrical and optical parameters are manipulated to eliminate the undesired performance limits. An ideal detector with perfect crystal quality is expected to have diffusion limited dark current. However, for low operating temperatures (<120K), which is usually the case for the high performance applications, SRH mechanism may dominate dark current especially for alternative substrate detectors and low crystal quality resulting in a short SRH lifetime (~200ns). Here, physical sizes, composition and doping profiles are optimized to suppress generation-recombination (GR) dark current so that cooling burden can be minimized. We numerically achieve ~30K (from ~85K to ~115K) increase on the operating temperature without degrading the system performance parameters for the detection of near room temperature object (300K) by placing a wide bandgap layer inside the bandgap.
Yigit Ozer and Serdar Kocaman, "A comparative design study for MWIR HgCdTe detectors," Proc. SPIE 10177, Infrared Technology and Applications XLIII, 101771H (Presented at SPIE Defense + Security: April 11, 2017; Published: 16 May 2017); https://doi.org/10.1117/12.2262717.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.