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Broadband Spectrometer with Single-Photon Sensitivity Exploiting Tailored Disorder
Nano Letters ( IF 10.8 ) Pub Date : 2020-03-11 , DOI: 10.1021/acs.nanolett.0c00171
Wladick Hartmann 1, 2 , Paris Varytis 3, 4 , Helge Gehring 1, 2 , Nicolai Walter 1, 2 , Fabian Beutel 1, 2 , Kurt Busch 3, 4 , Wolfram Pernice 1, 2
Affiliation  

Harnessing tailored disorder for broadband light scattering enables high-resolution signal analysis in nanophotonic spectrometers with a small device footprint. Multiple scattering events in the disordered medium enhance the effective path length which leads to increased resolution. Here we demonstrate an on-chip random spectrometer cointegrated with superconducting single-photon detectors suitable for photon-scarce environments. We combine an efficient broadband fiber-to-chip coupling approach with a random scattering area and broadband transparent silicon nitride waveguides to operate the spectrometer in a diffusive regime. Superconducting nanowire single-photon detectors at each output waveguide are used to perform spectral-to-spatial mapping via the transmission matrix at the system, allowing us to reconstruct a given probe signal. We show operation over a wide spectral range with sensitivity down to powers of −111.5 dBm in the telecom band.

中文翻译:

单光子灵敏度的宽带光谱仪可量身定制

利用为宽带光散射量身定制的无序状态,可以在具有较小设备占用空间的纳米光子光谱仪中进行高分辨率信号分析。无序介质中的多次散射事件会增加有效路径长度,从而导致分辨率提高。在这里,我们演示了与超导单光子探测器集成在一起的片上随机光谱仪,适用于光子稀少的环境。我们将有效的宽带光纤到芯片耦合方法与随机散射区域和宽带透明氮化硅波导相结合,以使光谱仪处于扩散状态。每个输出波导处的超导纳米线单光子探测器用于通过系统的传输矩阵执行光谱到空间的映射,从而使我们能够重构给定的探测信号。
更新日期:2020-04-24
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