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首页> 美国政府科技报告 >Development of Ultra-Low Noise, High Sensitivity Planar Metal Grating Coupled AlGaAs/GaAs Multiquantum Well IR Detectors for Focal Plane Array Staring IR Sensor Systems.
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Development of Ultra-Low Noise, High Sensitivity Planar Metal Grating Coupled AlGaAs/GaAs Multiquantum Well IR Detectors for Focal Plane Array Staring IR Sensor Systems.

机译：用于焦平面阵列凝固红外传感器系统的超低噪声，高灵敏度平面金属光栅耦合alGaas / Gaas多量子阱红外探测器的研制。

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In this reporting period, we have continued to make a significant progress towards the program goals. We have designed, fabricated and characterized several metal grating coupled bound-to-miniband (BTM) and step-bound-to-miniband (SBTM) transition QWIPs on the GaAs and InP substrates for 8-12 micrometer focal plane arrays staring infrared sensor applications. Specific tasks performed include: (1) the design and growth of several (BTM) GaAs- and (SBTM) in GaAs-based QWIP structures as well as a new type-II normal incident AlAs/AlGas QWIP structure by using molecular beam epitaxy (MBE) technique, (2) the design and fabrication of the 1-D (line-grating) and 2-D (cross-grating) metal grating couplers on the QWIP's with different granting periods (1.1, 3.2, 5, 7.2, and 10 micrometers), (3) the theoretical and experimental studies of the light coupling quantum efficiency versus grating period for the QWIP's, and (4) the theoretical and experimental studies of the dark current versus temperature and bias voltage for the BTM and SBTM QWIP's.

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