Ji Yanan, Fang Guoqiang, Shang Jingyu, Dong Xinyao, Wu Jinlei, Lin Xiang, Xu Wen, Dong Bin
Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, Liaoning116600, P. R. China.
ACS Appl Mater Interfaces. 2022 Nov 9;14(44):50045-50054. doi: 10.1021/acsami.2c14127. Epub 2022 Oct 30.
Lanthanide-doped upconversion nanoparticles (UCNPs) are rising as prospect nanomaterials for constructing polarization-sensitive narrowband near-infrared (NIR) photodetectors (PDs), which have attracted significant interest in astronomy, object identification, and remote sensing. However, polarized narrowband NIR photodetection and imaging based on UCNPs have yet to be realized. Herein, we demonstrate that NIR photodetection and imaging are capable of sensing polarized light as well as affording wavelength-selective detection at 1550 nm by integrating directional-Au@Ag nanorods (D-Au@Ag NRs) with NaYF:Er@NaYF UCNPs. Monolayer and large-area D-Au@Ag NRs polarization-sensitive plasmonic antenna films are obtained, and the center of their localized surface plasmon resonance (LSPR) peak is located at around 1550 nm. Experimental and theoretical results reveal that D-Au@Ag NRs have a sharp localized LSPR peak with a dominant scattering cross section. The UCNPs coupled with D-Au@Ag NRs exhibit significantly enhanced and strongly polarization-dependent luminescence with a high degree of polarization (DOP) of 0.72. The first polarization-resolved UC narrowband PD at 1550 nm is achieved, which delivers a DOP of 0.63, a detectivity of 1.69 × 10 Jones, and a responsivity of 0.32 A/W. Finally, we develop a polarized imaging system for 1550 nm with visual photoelectric detection based on the aforementioned PDs. Our work opens up possibilities for manipulating UC and developing next-generation polarization-sensitive narrowband infrared photodetection and imaging technology.
镧系掺杂的上转换纳米颗粒（UCNPs）正作为构建偏振敏感窄带近红外（NIR）光电探测器（PDs）的潜在纳米材料而兴起，这类探测器在天文学、目标识别和遥感领域引起了广泛关注。然而，基于UCNPs的偏振窄带近红外光探测和成像尚未实现。在此，我们证明通过将定向金@银纳米棒（D-Au@Ag NRs）与NaYF:Er@NaYF UCNPs集成，近红外光探测和成像能够感知偏振光，并在1550 nm处实现波长选择性探测。获得了单层大面积的D-Au@Ag NRs偏振敏感等离子体天线薄膜，其局域表面等离子体共振（LSPR）峰的中心位于1550 nm左右。实验和理论结果表明，D-Au@Ag NRs具有尖锐的局域LSPR峰，且散射截面占主导。与D-Au@Ag NRs耦合的UCNPs表现出显著增强且强烈依赖偏振的发光，偏振度（DOP）高达0.72。实现了首个1550 nm处的偏振分辨上转换窄带PD，其DOP为0.63，探测率为1.69×10琼斯，响应度为0.32 A/W。最后，我们基于上述PDs开发了一种用于1550 nm的具有视觉光电探测功能的偏振成像系统。我们的工作为操控上转换以及开发下一代偏振敏感窄带红外光探测和成像技术开辟了可能性。
