Superconducting nanowire single-photon detector with polarization insensitivity, ultrafast response, and high efficiency.

This study proposed what we believe to be a novel method for fabricating superconducting nanowire single-photon detectors (SNSPDs) with high efficiency, polarization insensitivity, and ultrafast response. To achieve these properties in niobium nitride (NbN) SNSPDs, the periodic four-split rings (PFSR) were positioned above the nanowires. This design uses the localized surface plasmon resonance to enhance the electric field around nanowires.

Stoichiometric characteristics and economic implications of water-soluble ions in PM from a resource-dependent city.

The stoichiometric characteristics of water-soluble ions (WSIs) in PM, which can be used as an indicator socioeconomic development level, are mostly depending on the sources and formation mechanism of PM. This work presents the stoichiometric characteristics and socioeconomic linkage of WSIs in PM from a resource-dependent city. The relationship between NO/SO and car parc indexes the contribution of mobile emission source.