可见光至中波红外 PbS/HgTe 胶体量子点成像器

IF 32.3 1区 物理与天体物理 Q1 OPTICS Nature Photonics Pub Date : 2024-08-05 DOI:10.1038/s41566-024-01492-1
Ge Mu, Yimei Tan, Cheng Bi, Yanfei Liu, Qun Hao, Xin Tang
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引用次数: 0

摘要

多光谱传感和成像需要宽光谱范围的光探测。尽管已利用各种低维材料展示了具有高性能的宽带单元素探测器,但宽带焦平面阵列成像器却鲜有报道。在这里,我们提出了一种堆叠式硫化铅/碲化汞胶体量子点光电探测器配置,具有优化的分级能隙。这种结构可实现 0.4 至 5.0 µm 的超宽带光谱响应,在 0.4、0.7、2.2 和 4.2 µm 波长下的响应值分别为 0.23、0.31、0.83 和 0.71 A W-1。我们还制作了焦平面阵列成像仪,其分辨率为 640 × 512,光响应不均匀度低至 6%,噪声等效温差低至 34 mK。我们展示了宽带成像技术,利用一组光学滤光片同时捕捉短波红外和中波红外信息,以及红、绿、蓝、短波红外和中波红外通道的多光谱成像。
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Visible to mid-wave infrared PbS/HgTe colloidal quantum dot imagers

Photodetection over a broad spectral range is necessary for multispectral sensing and imaging. Despite the fact that broadband single-element detectors with high performance have been demonstrated with various low-dimensional materials, broadband focal plane array imagers have been rarely reported. Here we propose a stacked lead sulfide/mercury telluride colloidal quantum dot photodetector configuration with optimized graded energy gaps. This architecture allows for ultrabroadband spectral response from 0.4 to 5.0 µm, with responsivity values of 0.23, 0.31, 0.83 and 0.71 A W−1 at 0.4, 0.7, 2.2 and 4.2 µm, respectively. We also fabricate a focal plane array imager with a resolution of 640 × 512, a low photoresponse non-uniformity down to 6% and a noise equivalent temperature difference as low as 34 mK. We demonstrate broadband imaging by simultaneously capturing both short-wave infrared and mid-wave infrared information, as well as multispectral imaging in the red, green, blue, short-wave infrared and mid-wave infrared channels, using a set of optical filters.

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来源期刊
Nature Photonics
Nature Photonics 物理-光学
CiteScore
54.20
自引率
1.70%
发文量
158
审稿时长
12 months
期刊介绍: Nature Photonics is a monthly journal dedicated to the scientific study and application of light, known as Photonics. It publishes top-quality, peer-reviewed research across all areas of light generation, manipulation, and detection. The journal encompasses research into the fundamental properties of light and its interactions with matter, as well as the latest developments in optoelectronic devices and emerging photonics applications. Topics covered include lasers, LEDs, imaging, detectors, optoelectronic devices, quantum optics, biophotonics, optical data storage, spectroscopy, fiber optics, solar energy, displays, terahertz technology, nonlinear optics, plasmonics, nanophotonics, and X-rays. In addition to research papers and review articles summarizing scientific findings in optoelectronics, Nature Photonics also features News and Views pieces and research highlights. It uniquely includes articles on the business aspects of the industry, such as technology commercialization and market analysis, offering a comprehensive perspective on the field.
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