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首页> 外文期刊>Optical and quantum electronics >Tunable far infrared detection using quantum rings-in-well intersubband photodetectors
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Tunable far infrared detection using quantum rings-in-well intersubband photodetectors

机译：使用量子环阱子带间光电探测器进行可调谐的远红外检测

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摘要

A novel design of quantum ring intersubband photodetectors is proposed based on quantum rings-in-well structure and its performance characteristics studied by simulation. The photon absorption occurs for intersubband transitions between quantum ring sub-bands and well states. The detector is expected to be better controlled over operating wavelength and normal incidence sensitivity in far infrared. Since the quantum well states change by electric field, the peak responsivity wavelength is voltage tunable. Our results show that increasing the bias voltage to 5 V leads to a red-shift about 4 urn in peak wavelength. For proposed detector a quantum-mechanical approach is introduced for calculation of photoconductive gain. Peak responsivity about 0.6 A/W at λ = 20 μm is achieved at T = 77 K using this detector.
机译：提出了一种基于阱中量子环结构的量子环带间光探测器的新颖设计，并通过仿真研究了其性能特性。光子吸收发生在量子环子带与阱态之间的子带间跃迁。预期该探测器可以更好地控制工作波长和远红外法线入射灵敏度。由于量子阱状态因电场而变化，因此峰值响应波长是电压可调的。我们的结果表明，将偏置电压增加到5 V会导致峰值波长出现约4 urn的红移。对于提出的探测器，引入了一种量子力学方法来计算光导增益。使用该检测器，在T = 77 K时，在λ= 20μm时可获得约0.6 A / W的峰值响应度。

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