【摘 要】
：
Superconducting nanowire single-photon detectors (SNSPDs) have attracted considerable attention owing to their excellent detection performance;however, the unde
【机 构】
：
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and
论文部分内容阅读
Superconducting nanowire single-photon detectors (SNSPDs) have attracted considerable attention owing to their excellent detection performance;however, the underlying physics of the detection process is still unclear. In this study, we investigate the wavelength dependence of the intrinsic detection efficiency (IDE) for NbN SNSPDs. We fabricate various NbN SNSPDs with linewidths ranging from 30 nm to 140 nm. Then, for each detector, the IDE curves as a function of bias current for different incident photon wavelengths of 510–1700 nm are obtained. From the IDE curves, the relations between photon energy and bias current at a certain IDE are extracted. The results exhibit clear nonlinear energy–current relations for the NbN detectors, indicating that a detection model only considering quasiparticle diffusion is unsuitable for the meander-type NbN-based SNSPDs. Our work provides additional experimental data on SNSPD detection mechanism and may serve as an interesting reference for further investigation.
其他文献
The underlying mechanism of the spectral cleaning effect of the cross-polarized wave (XPW) generation process was theoretically investigated.This study shows th
数学学习离不开思维,数学探索需要通过思维来实现。在我们学习数学的过程中,发现其中蕴含着许多重要的思想方法。如果我们掌握了这些思想方法,能将他们灵活的应用于我们的解
《语文课程标准》指出:“语文是最重要的交际工具,是人类文化的重要组成部分。工具性与人文性的统一,是语文课程的基本特点。”“自然风光、文物古迹、民俗风情、国内外重大
教学过程是一种提出问题与解决问题的持续不断的活动.教师的问题设计是一个重要的经验技术问题,但在我们的实际课堂教学中由于备课不充分或教师经验、心理状态等原因却存在一
The deformation process of the microstructure in 2205 duplex stainless steel (DSS) under thermo-mechanical coupling at 250 ℃ was investigated using digital ima
Quantum gas microscopy has enabled the study on intriguing properties of ultracold atoms in optical lattices.It provides the cutting-edge technology for manipul
The adding of ZnMgO asymmetric double barriers (ADB) in p-ZnO:(Li,N)/n-ZnO homojunction affects the p-n junction device performance prominently.Two different ho
In this work,we tuned the magnetostructural transformation and the coupled magnetocaloric properties of Mn48-xVxNi42Sn10 (x =0,1,2,and 3) ferromagnetic shape me
Based on first-principles simulations, we revisit the crystal structures, electronic structures, and structural stabilityof the layered transition metal dichalc
Adsorption of chalcogen atoms on metal surfaces has attracted increasing interest for both the fundamental research and industrial applications. Here, we report