In contrast to the general operational amplifier (op amp) noise model widely used, we propose a more complete and applicable noise model, which considers the correlation between equivalent input voltage noise source and current noise source . Based on the super-position theorem and equivalent circuit noise theory, our formulae for the equivalent input noise spectrum density of an op amp noise a...

We have developed novel single-photon detectors in the 10-50 μm wavelength region. The detectors are charge-sensitive infrared phototransistors (CSIPs) fabricated in GaAs/AlGaAs double quantum well (QW) structures, in which a photo-generated hole (+e) in the floating gate (upper QW) modulates the conductance of a capacitively-coupled channel located underneath (lower QW). The excellent noise eq...

A cryogen-free terahertz (THz) imaging system based on a high-temperature superconducting (HTS) Josephson junction detector is reported. The detector was made of a YBa2Cu3O7-x (YBCO) step-edge Josephson junction and integrated into an on-chip thin-film antenna. The HTS Josephson detector was cooled via a commercial mechanical cryocooler; an important step towards cryogen-free THz instrumentatio...

1. SUMMARY: Physical Sciences Inc. (PSI), in conjunction with its subcontractor, VTech Engineering Corp., developed an ultra low noise receiver module (RM) for direct detection LWIR LIDAR systems. The receiver module is compatible with emerging LWIR source technologies, e.g., optical parametric amplifier-based sources, as well as existing frequency-agile CO2 laser technology. In this paper we p...

Terahertz (THz) technology has great potential for applications in various fields, such as security imaging detection, optical communication, environmental quality monitoring, and life sciences. Most of these require THz detectors with high sensitivity, fast response, a miniaturized size that can operate at room temperature. In this study, we present graphene detector integrated an asymmetric b...

Due to the low photon energy in relevant frequency band, fewer materials can directly excite carriers, and an extreme lack of high-performance, large-area detectors, limit promotion, development 6G technology. In addition, flexible detectors with integration communication Internet Things technology has good prospects for application optoelectronic devices, which are also urgently needed. A thin...

in this study, results of noise level measurements performed in 4 different mining sites aregiven. noise level measurements performed in opencast mining site of konya ilgin lignite corporation (ilc), in konya eyak mining quarry site and in aydin cine feldspar ore dressing facility have been evaluatedtogether with worker surveys. the noise level measurements performed in manisa soma uyar mining ...

in this study, results of noise level measurements performed in 4 different mining sites aregiven. noise level measurements performed in opencast mining site of konya ilgin lignite corporation (ilc), in konya eyak mining quarry site and in aydin cine feldspar ore dressing facility have been evaluatedtogether with worker surveys. the noise level measurements performed in manisa soma uyar mining ...

Nanoelectromechanical (NEMS) resonators are promising uncooled thermal infrared (IR) detectors to overcome existing sensitivity limits. Here, we investigated NEMS trampoline made of silicon nitride (SiN) as IR detectors. Trampolines have an enhanced responsivity more than two orders magnitude compared state-of-the-art SiN drums. The characterized yield a in terms noise equivalent power (NEP) 7 ...

Two novel resonant-cavity-enhanced (RCE) GeSn single-photon avalanche photodiode (SPAD) detectors are designed and simulated for high-efficiency detection at 1550 2000 nm wavelength room temperature sensing optical quantum applications. The RCE SPAD consists of a PIPIN GeSn/Si heterostructures embedded in an cavity formed by distributed Bragg reflector (DBR) surface. results show that high phot...