应用光学, 2019, 40 (3): 429, 网络出版: 2019-06-10  

可见/近红外超光谱碲镉汞焦平面研究

Research on HgCdTe focal plane arrays for ultra-spectrum detection in Vis/NIR
作者单位
1 中国科学院 上海技术物理研究所 红外成像材料与器件重点实验室,上海200083
2 上海科学技术大学 信息科学与技术学院,上海 201210
摘要
为了满足可见-近红外波段的高光谱分辨率和高灵敏观测需求,采用大面阵、低噪声碲镉汞焦平面制备技术和低损伤衬底去除技术,成功制备了高信噪比大面阵可见/近红外碲镉汞焦平面探测器。无损衬底去除技术采用机械抛光和化学腐蚀相结合的方法,使焦平面的响应波段拓展至400 nm~2 600 nm。采用信号定量化焦平面测试评价手段对可见/近红外碲镉汞焦平面的性能进行评估,640×512 25 μm中心距碲镉汞焦平面的波段量子效率可达到88.4%,信噪比达到287,有效像元率大于98%,能够获得清晰的可见和近红外波段图像。
Abstract
To meet the requirement of high-resolution and high-sensitivity observation in visible-near infrared, the HgCdTe focal plane arrays(FPAs) with high signal-to-noise ratio was fabricated based on the large-array low-noise HgCdTe detector manufacture technology and low-damage substrate removal technology. The response of short-wave infrared detector was extended to 400 nm~2 600 nm by the ZnCdTe substrate removed with mechanical thinning and chemical wet etching technology. After the fabrication of the Vis/NIR 640×512 pixel 25 m FPAs, the performance was evaluated with a certain quantity of radiation. The results indicate that the quantum efficiency is approximately 88.4% at 2.32 μm waveband, the effective pixel rate is 98% and the signal-to-noise ratio is 287, the clear imaging quality in Vis/NIR waveband can be obtained.

张姗, 沈益铭, 刘丹, 钟艳红, 魏彦锋, 廖清君, 陈洪雷, 林春, 丁瑞军, 何力. 可见/近红外超光谱碲镉汞焦平面研究[J]. 应用光学, 2019, 40(3): 429. ZHANG Shan, SHEN Yiming, LIU Dan, ZHONG Yanhong, WEI Yanfeng, LIAO Qingjun, CHEN Honglei, LIN Chun, DING Ruijun, HE Li. Research on HgCdTe focal plane arrays for ultra-spectrum detection in Vis/NIR[J]. Journal of Applied Optics, 2019, 40(3): 429.

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