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GeSi infrared detectors

机译:GE SI infrared detectors

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摘要

Germanium-silicon heterojunctions can be used to fabricate detectors suitable for use in far-infrared focal plane arrays. We report here the growth and characterization of multiple quantum well and heterojunction internal photoemission (HIP) structures which have thresholds uitable for the 8-12 mum region. We have used absorption measurements to show that free-carrier absorption is dominant in both structures for normally incident illumination. The HIP structure is more attractive from the point of view of integability with silicon readout circuitry. We will report the results of optical and electrical characterization of HIP detectors which show that this detector can achieve background-limited infrared performance at an operating temperature of 40 K.
机译:锗 - 硅杂交功能可用于制造适用于远红外焦平面阵列的探测器。 我们在此报告多量子阱和异质结的生长和表征,其具有8-12扇米区域的阈值的阈值。 我们使用了吸收测量来表明,自由载体吸收在两种结构中占主导地位,用于通常入射的照明。 从硅读出电路的可全部性的角度来看,髋关节结构更具吸引力。 我们将报告髋关节探测器的光学和电气表征的结果,表明该检测器可以在40k的工作温度下实现背景限制的红外性能。

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