Two auditory phenomena--stream segregation and illusory continuity through a wide-band noise interruption--were studied to determine whether the same principles of perceptual organization applied to both. A cycle was formed of a repeating alternation of two short bursts of narrow-band noise (NBN), one centered at a high frequency (H) and the other at a low frequency (L), with shorter bursts of ...

Low noise terahertz (THz) receivers based on superconducting niobium nitride (NbN) hot electron bolometer (HEB) mixers have been designed, fabricated and measured for applications in astronomy and cosmology. The NbN HEB mixer consists of a planar antenna and an NbN bridge connecting across the antenna’s inner terminals on a high-resistivity Si substrate. To eliminate the influence of direct det...

We construct high-quality graphene-based van der Waals devices with narrow superconducting niobium nitride (NbN) electrodes, in which superconductivity and a robust fractional quantum Hall (FQH) state coexist. find possible signature for crossed Andreev reflection (CAR) across the superconductor separating two FQH edges. Our observed CAR probabilities particlelike fillings are markedly higher t...

We use ab initio pseudopotential total energy calculations with a plane wave basis set to investigate the structural energetics of various phases of polymorphic NbN. Particular attention is given to its recently discovered superconducting phase with a Tc of 16.4 K, reported to have the NbO structure type. Results of total energy calculations show that it is in fact energetically unfavorable for...

Configurations capable of maximizing both the absorption component of system detection efficiency and the achievable polarization contrast were determined for 1550 nm polarized light illumination of different plasmonic structure integrated superconducting nanowire single-photon detectors (SNSPDs) consisting of p = 264 nm and P = 792 nm periodic niobium nitride (NbN) patterns on silica substrate...

We present our quantum efficiency (QE) and noise equivalent power (NEP) measurements of the meandertype ultrathin NbN superconducting single-photon detector in the visible to infrared radiation range. The nanostructured devices with 3.5-nm film thickness demonstrate QE up to ~10% at 1.3 – 1.55 μm wavelength, and up to 20% in the entire visible range. The detectors are sensitive to infrared radi...

In the future generations of telecommunication satellites, it will be necessary to reduce the analog part in reception systems and to achieve RF frontend at higher carrier frequencies with higher sensitivity and higher bandwidth. RSFQ (Rapid Single Flux Quantum) superconducting logic is suitable to process very high speed digital data processing with very low power dissipation and with performa...

This paper describes the optimization of existing technology for fabrication superconducting films and high-quality tunnel junctions on a magnetron sputtering facility. To expand frequency range to 1.1 THz obtain limiting parameters elements, regimes production Nb, NbN, NbTiN were optimized. These are used fabricate superconductor-insulator-superconductor Nb/Al--AlN/NbN junctions. Al required c...

Abstract Water-based lubrication has attracted wide attention as an oil-free method owing to its greener and cleaner means. However, due operating in the water environment, most moving parts would inevitably suffer from abrasion, rusting, aging problems. Developing a novel solid-water composite system with ultra-low friction wear will open new possibilities for innovative material research deve...