发表机构
The Australian National University; University of Melbourne; The University of Sydney; University of Technology Sydney; Air Force Research Laboratory（澳大利亚国立大学; 墨尔本大学; 悉尼大学; 悉尼科技大学; 空军研究实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出基于InAs/InP核壳纳米线探测器阵列的室温扩展短波红外计算光谱仪，利用几何编码光谱响应实现自供电宽带探测，实现无滤光片光谱重建与超光谱成像。
AI 中文摘要
扩展短波红外（e-SWIR）波段的光谱传感对于分子分析、红外成像和机器视觉至关重要，这推动了紧凑型光谱仪在更广泛应用中的发展。然而，该波长区域的传统商用现货光谱仪由于依赖外部色散光学元件/滤光片和/或低温附件而价格昂贵且体积庞大。其他新兴的计算光谱仪基于Si和InGaAs光电探测器，这些探测器仍主要聚焦于可见光和近红外波段，很少有探测器平台能在e-SWIR波段同时提供宽带灵敏度、低噪声室温操作以及多样化的光谱特征，以实现准确的识别和重建。在此，我们报道了一种基于InAs/InP核壳纳米线光电探测器阵列的室温e-SWIR计算光谱仪，该阵列具有几何编码的光谱响应。这些探测器在1--3 $\mu$m范围内表现出自供电的宽带光响应，响应度高达0.215 A W$^{-1}$，探测率高达$1.6 \times 10^{9}$ cm Hz$^{1/2}$ W$^{-1}$，响应时间达到微秒级。我们利用这种优异的探测器性能，通过紧凑的多像素光电探测器阵列器件演示了无滤光片的光谱重建。这实现了高精度的分子吸收光谱重建和超光谱成像。我们的结果表明，InAs纳米线阵列是室温下e-SWIR波段紧凑型计算光谱测量和成像的一个有前景的平台。
英文摘要
Spectral sensing in the extended shortwave infrared (e-SWIR) is important for molecular analysis, infrared imaging, and machine vision, motivating the development of compact spectrometers for broader applications. However, conventional commercial off-the-shelf spectrometers in this wavelength region are expensive and bulky due to their reliance on external dispersive optics/filters and/or cryogenic accessories. Other emerging computational spectrometers are based on Si and InGaAs photodetectors that remain focused on the visible and near-infrared, with few detector platforms operating in the e-SWIR regime that simultaneously provide broadband sensitivity, low-noise room-temperature operation, and diverse spectral signatures for accurate identification and reconstruction. Here, we report a room-temperature e-SWIR computational spectrometer based on InAs/InP core-shell nanowire photodetector arrays with geometry-encoded spectral responses. The detectors exhibit self-powered broadband photoresponse across the 1--3 $μ$m range, with responsivity up to 0.215 A W$^{-1}$, detectivity up to $1.6 \times 10^{9}$ cm Hz$^{1/2}$ W$^{-1}$, and microsecond response times. The excellent detector performance is leveraged to demonstrate filter-free spectral reconstruction using a compact multipixel photodetector array device. This enables high-accuracy molecular absorption spectrum reconstruction and hyperspectral imaging. Our results indicate that InAs nanowire arrays are a promising platform for compact computational spectrometry and imaging in the e-SWIR at room temperature.
