近日，山东大学的孙宝清&高原及其研究团队取得一项新进展。经过不懈努力，他们实现支持单像素检测的量子点红外高光谱成像。相关研究成果已于2024年5月28日在国际知名学术期刊《光：科学与应用》上发表。

据悉，近红外(NIR)高光谱成像是一种强大的技术，可以捕获近红外光谱范围内的三维(3D)光谱空间信息，提供广泛的应用。然而，InGaAs焦平面阵列(FPA)的高成本阻碍了近红外高光谱成像的广泛采用。

为了解决这一挑战，在本研究中，研究人员采用了一种替代方法-近红外高光谱成像的单像素检测。这项研究表明，单像素检测优于传统的FPA，为光谱和成像重建提供了优越的信噪比(SNR)。为了实现这一策略，研究人员利用自组装胶体量子点(CQDs)和数字微镜器件(DMD)进行近红外光谱和空间信息复用，并辅以单像素检测来同时进行光谱和图像重建。

实验结果显示，近红外高光谱成像取得了成功，检测窗口约600nm，平均光谱分辨率为8.6nm，像素分辨率为128 × 128。所获取的光谱和空间数据与参考仪器高度一致，从而验证了该研究方法的有效性。通过摒弃昂贵且笨重的FPA和波长选择组件，这一方案有望推动经济、便捷的近红外高光谱成像技术，进而拓宽其潜在的应用领域。

附：英文原文

Title: Quantum dot-enabled infrared hyperspectral imaging with single-pixel detection

Author: Meng, Heyan, Gao, Yuan, Wang, Xuhong, Li, Xianye, Wang, Lili, Zhao, Xian, Sun, Baoqing

Issue&Volume: 2024-05-28

Abstract: Near-infrared (NIR) hyperspectral imaging is a powerful technique that enables the capture of three-dimensional (3D) spectra-spatial information within the NIR spectral range, offering a wide array of applications. However, the high cost associated with InGaAs focal plane array (FPA) has impeded the widespread adoption of NIR hyperspectral imaging. Addressing this challenge, in this study, we adopt an alternative approach—single-pixel detection for NIR hyperspectral imaging. Our investigation reveals that single-pixel detection outperforms conventional FPA, delivering a superior signal-to-noise ratio (SNR) for both spectral and imaging reconstruction. To implement this strategy, we leverage self-assembled colloidal quantum dots (CQDs) and a digital micromirror device (DMD) for NIR spectral and spatial information multiplexing, complemented by single-pixel detection for simultaneous spectral and image reconstruction. Our experimental results demonstrate successful NIR hyperspectral imaging with a detection window about 600nm and an average spectral resolution of 8.6nm with a pixel resolution of 128 × 128. The resulting spectral and spatial data align well with reference instruments, which validates the effectiveness of our approach. By circumventing the need for expensive and bulky FPA and wavelength selection components, our solution shows promise in advancing affordable and accessible NIR hyperspectral imaging technologies, thereby expanding the range of potential applications.

DOI: 10.1038/s41377-024-01476-4

Source: https://www.nature.com/articles/s41377-024-01476-4