Altaqui Ali, Sen Pratik, Schrickx Harry, Rech Jeromy, Lee Jin-Woo, Escuti Michael, You Wei, Kim Bumjoon J, Kolbas Robert, O'Connor Brendan T, Kudenov Michael
Department of Electrical and Computer Engineering, North Carolina State University, 2410 Campus Shore Drive, Raleigh, NC 27695, USA.
Department of Mechanical and Aerospace Engineering and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, 911 Oval Drive, Raleigh, NC 27695, USA.
Sci Adv. 2021 Mar 3;7(10). doi: 10.1126/sciadv.abe3196. Print 2021 Mar.
Combining hyperspectral and polarimetric imaging provides a powerful sensing modality with broad applications from astronomy to biology. Existing methods rely on temporal data acquisition or snapshot imaging of spatially separated detectors. These approaches incur fundamental artifacts that degrade imaging performance. To overcome these limitations, we present a stomatopod-inspired sensor capable of snapshot hyperspectral and polarization sensing in a single pixel. The design consists of stacking polarization-sensitive organic photovoltaics (P-OPVs) and polymer retarders. Multiple spectral and polarization channels are obtained by exploiting the P-OPVs' anisotropic response and the retarders' dispersion. We show that the design can sense 15 spectral channels over a 350-nanometer bandwidth. A detector is also experimentally demonstrated, which simultaneously registers four spectral channels and three polarization channels. The sensor showcases the myriad degrees of freedom offered by organic semiconductors that are not available in inorganics and heralds a fundamentally unexplored route for simultaneous spectral and polarimetric imaging.
将高光谱成像和偏振成像相结合，可提供一种强大的传感模式，在从天文学到生物学的广泛领域都有应用。现有方法依赖于时间数据采集或空间分离探测器的快照成像。这些方法会产生降低成像性能的基本伪像。为了克服这些限制，我们展示了一种受口足类动物启发的传感器，它能够在单个像素中进行快照高光谱和偏振传感。该设计由堆叠偏振敏感有机光伏（P-OPV）和聚合物延迟器组成。通过利用P-OPV的各向异性响应和延迟器的色散，可获得多个光谱和偏振通道。我们表明，该设计能够在350纳米带宽内感应15个光谱通道。还通过实验展示了一种探测器，它能同时记录四个光谱通道和三个偏振通道。该传感器展示了有机半导体所提供的无数自由度，而这些自由度在无机材料中是不存在的，并且为同时进行光谱和偏振成像开辟了一条尚未被充分探索的基本途径。
