Image data acquired with fused multispectral information can be used for effective identification and navigation owing to additional information beyond human vision, including thermal distribution, night vision, and molecular composition. However, the construction of photodetectors with such capabilities is hindered by the structural complexity arising from the integration of multiple semiconductor junctions with distinct energy gaps and lattice constants. In this work, we develop a colloidal quantum-dot dual-mode detector capable of detecting, separating, and fusing photons from various wavelength ranges. Using three vertically stacked colloidal quantum-dot homojunctions with alternating polarity, single-band short-wave infrared imaging and fused-band imaging (short-wave and mid-wave infrared) can be achieved with the same detector by controlling bias polarity and magnitude. The dual-mode detectors show detectivity up to 8×1010$8\times {10}^{10}$ Jones at the fused-band mode and 3.1×1011$3.1\times {10}^{11}$ Jones at the single-band mode, respectively. Without image post-processing algorithms, the dual-mode detectors could provide both night vision and thermal information-enhanced night vision imaging capability. To the best of our knowledge, this is the first colloidal quantum-dot detector that can achieve such functionality. The operation mode can be changed at a high frequency up to 1.7 MHz, making it possible to achieve simultaneously dual-mode imaging and remote temperature sensing.

中文翻译：

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胶体量子点三结单/融合波段双模中红外成像

由于人类视觉之外的附加信息，包括热分布、夜视和分子组成，使用融合多光谱信息获取的图像数据可用于有效识别和导航。然而，由于具有不同能隙和晶格常数的多个半导体结的集成所产生的结构复杂性，阻碍了具有这种能力的光电探测器的构建。在这项工作中，我们开发了一种胶体量子点双模检测器，能够检测、分离和融合来自不同波长范围的光子。使用三个具有交替极性的垂直堆叠胶体量子点同质结，通过控制偏置极性和幅度，可以在同一台探测器上实现单波段短波红外成像和融合波段成像（短波和中波红外）。双模式检测器的检测能力高达$8\times {10}^{10}$融合波段模式下的8 × 10 10琼斯和单波段模式下的3.1 × 10 11$3.1\times {10}^{11}$琼斯，分别。在没有图像后处理算法的情况下，双模探测器可以同时提供夜视和热信息增强的夜视成像能力。据我们所知，这是第一个可以实现这种功能的胶体量子点探测器。可在高达 1.7 MHz 的高频下改变工作模式，从而可以同时实现双模成像和远程温度传感。