20 February 2018 Dual-band quantum well infrared photodetector with metallic structure
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Proceedings Volume 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application; 106970Z (2018) https://doi.org/10.1117/12.2309926
Event: Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2017, Nanjing, China
Abstract
The quantum efficiency of the dual bands quantum well infrared photodetectors(QWIP) has been widely concerned in recent years. A novel structure for the dual-band quantum well infrared detectors which is based on GaAs/AlGaAs designed in this paper is aimed to improve the absorption efficiency. The structure replaces the conventional grating with a metallic grating based on surface plasmon polaritons(SPPS), and we further insert a metal structure in the periodic quantum well layer. The simulation result shows that the use of the different shapes of the metal holes can remarkably improve the optical coupling efficiency due to the surface plasmon effect. By optimizing parameters of the structure, it can work in the dual infrared bands of 3-5um and 8-12um. Moreover, the absorption rate increased by 20% compared with traditional structure of Dual-band QWIP.
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Yang Wu, Hongmei Liu, Pingzhou Li, "Dual-band quantum well infrared photodetector with metallic structure", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106970Z (20 February 2018); doi: 10.1117/12.2309926; https://doi.org/10.1117/12.2309926
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