Kong Lingdong, Zhao Qingyuan, Wang Hui, Guo Jiawei, Lu Haiyangbo, Hao Hao, Guo Shuya, Tu Xuecou, Zhang Labao, Jia Xiaoqing, Kang Lin, Wu Xinglong, Chen Jian, Wu Peiheng
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
Purple Mountain Laboratories, Nanjing, Jiangsu 211111, China.
Nano Lett. 2021 Nov 24;21(22):9625-9632. doi: 10.1021/acs.nanolett.1c03393. Epub 2021 Nov 3.
Designing a spectrometer without the need for wavelength multiplexing optics can effectively reduce the complexity and physical footprint. On the basis of the computational spectroscopic strategy and combining a broadband-responsive dynamic detector, we successfully demonstrate an optics-free single-detector spectrometer that maps the tunable quantum efficiency of a superconducting nanowire into a matrix to build a solvable mathematical equation. Such a spectrometer can realize a broadband spectral responsivity ranging from 660 to 1900 nm. The spectral resolution at the telecom is sub-10 nm, exceeding the energy resolving capacity of existing infrared single-photon detectors. Meanwhile, benefiting from the optics-free setup, precise time-of-flight measurements can be simultaneously achieved. We have demonstrated a spectral LiDAR with eight spectral channels. This spectrometer scheme paves the way for applying superconducting nanowire detectors in multifunctional spectroscopy and represents a conceptual advancement for on-chip spectroscopy and spectral imaging.
设计一种无需波长复用光学元件的光谱仪可以有效降低其复杂性和物理尺寸。基于计算光谱策略并结合宽带响应动态探测器，我们成功展示了一种无光学元件的单探测器光谱仪，该光谱仪将超导纳米线的可调量子效率映射到一个矩阵中以构建一个可解的数学方程。这样的光谱仪可以实现660至1900纳米的宽带光谱响应度。电信波段的光谱分辨率低于10纳米，超过了现有红外单光子探测器的能量分辨能力。同时，受益于无光学元件的设置，可以同时实现精确的飞行时间测量。我们已经展示了一种具有八个光谱通道的光谱激光雷达。这种光谱仪方案为超导纳米线探测器在多功能光谱学中的应用铺平了道路，代表了片上光谱学和光谱成像的概念性进展。
