Near-infrared InGaAs detectors for background-limited imaging and photometry
Near-infrared InGaAs detectors for background-limited imaging and photometry
复制标题
用于背景限制成像和光度测定的近红外 InGaAs 探测器
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Simcoe
中科院分区：
文献类型：
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作者：
P. Sullivan;B. Croll;R. Simcoe
InGaAs探测器最初是为夜视设备设计的，现在开始在地面宽带成像中实现背景受限的性能。这些探测器的较低成本可以使多波段仪器、小型望远镜阵列和大焦面成为可能，而这些对于高性能的HgCdTe探测器来说是不经济的。我们开发了一款相机来操作FLIR AP1121传感器，使用深度热电冷却和斜坡上采样，以最大限度地减少噪音。我们测得暗电流为163e-S-1Pix-1，读取噪声为87e-the-the-ramp，势垒深度为80k e-。实验室光度测试达到了230ppm hr-1/2的稳定性，这是探测系外行星凌日所需的。InGaAs探测器也适用于近红外时间域天文学的其他分支，从棕矮星天气到引力波跟踪。
Originally designed for night-vision equipment, InGaAs detectors are beginning to achieve background-limited performance in broadband imaging from the ground. The lower cost of these detectors can enable multi-band instruments, arrays of small telescopes, and large focal planes that would be uneconomical with high-performance HgCdTe detectors. We developed a camera to operate the FLIR AP1121 sensor using deep thermoelectric cooling and up-the-ramp sampling to minimize noise. We measured a dark current of 163 e- s-1 pix-1, a read noise of 87 e- up-the-ramp, and a well depth of 80k e-. Laboratory photometric testing achieved a stability of 230 ppm hr-1/2, which would be required for detecting exoplanet transits. InGaAs detectors are also applicable to other branches of near-infrared time-domain astronomy, ranging from brown dwarf weather to gravitational wave follow-up.